40144025 has 6 divisors (see below), whose sum is σ = 49778622. Its totient is φ = 32115200.

The previous prime is 40144019. The next prime is 40144031. The reversal of 40144025 is 52044104.

It is an interprime number because it is at equal distance from previous prime (40144019) and next prime (40144031).

It can be written as a sum of positive squares in 3 ways, for example, as 1567504 + 38576521 = 1252^2 + 6211^2 .

It is not a de Polignac number, because 40144025 - 2⁸ = 40143769 is a prime.

It is a super-2 number, since 2×40144025² = 3223085486401250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40143988 and 40144006.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 802856 + ... + 802905.

It is an arithmetic number, because the mean of its divisors is an integer number (8296437).

Almost surely, 2^40144025 is an apocalyptic number.

It is an amenable number.

40144025 is a deficient number, since it is larger than the sum of its proper divisors (9634597).

40144025 is a wasteful number, since it uses less digits than its factorization.

40144025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605771 (or 1605766 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40144025 is about 6335.9312654100. The cubic root of 40144025 is about 342.4051631506.

Adding to 40144025 its reverse (52044104), we get a palindrome (92188129).

The spelling of 40144025 in words is "forty million, one hundred forty-four thousand, twenty-five".