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25400065 = 55080013
BaseRepresentation
bin110000011100…
…1001100000001
31202210110100011
41200321030001
523000300230
62304224521
7425616445
oct140711401
952713304
1025400065
1113379499
12860b141
135354332
143532825
15236ae2a
hex1839301

25400065 has 4 divisors (see below), whose sum is σ = 30480084. Its totient is φ = 20320048.

The previous prime is 25400059. The next prime is 25400071. The reversal of 25400065 is 56000452.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25400059) and next prime (25400071).

It can be written as a sum of positive squares in 2 ways, for example, as 13593969 + 11806096 = 3687^2 + 3436^2 .

It is a cyclic number.

It is not a de Polignac number, because 25400065 - 223 = 17011457 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540002 + ... + 2540011.

It is an arithmetic number, because the mean of its divisors is an integer number (7620021).

Almost surely, 225400065 is an apocalyptic number.

It is an amenable number.

25400065 is a deficient number, since it is larger than the sum of its proper divisors (5080019).

25400065 is an equidigital number, since it uses as much as digits as its factorization.

25400065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080018.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 25400065 is about 5039.8477159533. The cubic root of 25400065 is about 293.9532566407.

The spelling of 25400065 in words is "twenty-five million, four hundred thousand, sixty-five".

Divisors: 1 5 5080013 25400065