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40000025 = 5213123077
BaseRepresentation
bin1001100010010…
…1101000011001
32210021012201102
42120211220121
540220000100
63545201145
7663665102
oct230455031
983235642
1040000025
112064067a
12114901b5
138396870
1454533a9
1537a1cd5
hex2625a19

40000025 has 12 divisors (see below), whose sum is σ = 53415852. Its totient is φ = 29538240.

The previous prime is 40000021. The next prime is 40000033. The reversal of 40000025 is 52000004.

It can be written as a sum of positive squares in 6 ways, for example, as 5331481 + 34668544 = 2309^2 + 5888^2 .

It is a sliding number, since 40000025 = 25 + 40000000 and 1/25 + 1/40000000 = 0.040000025.

It is not a de Polignac number, because 40000025 - 22 = 40000021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39999970 and 40000015.

It is not an unprimeable number, because it can be changed into a prime (40000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61214 + ... + 61863.

It is an arithmetic number, because the mean of its divisors is an integer number (4451321).

Almost surely, 240000025 is an apocalyptic number.

It is an amenable number.

40000025 is a deficient number, since it is larger than the sum of its proper divisors (13415827).

40000025 is a wasteful number, since it uses less digits than its factorization.

40000025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123100 (or 123095 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 40000025 is about 6324.5572967600. The cubic root of 40000025 is about 341.9952605843.

Adding to 40000025 its reverse (52000004), we get a palindrome (92000029).

It can be divided in two parts, 400000 and 25, that multiplied together give a 7-th power (10000000 = 107).

The spelling of 40000025 in words is "forty million, twenty-five", and thus it is an aban number and an uban number.

Divisors: 1 5 13 25 65 325 123077 615385 1600001 3076925 8000005 40000025