25756497 has 12 divisors (see below), whose sum is σ = 40065844. Its totient is φ = 15850080.

The previous prime is 25756459. The next prime is 25756501. The reversal of 25756497 is 79465752.

It can be written as a sum of positive squares in 2 ways, for example, as 7403841 + 18352656 = 2721^2 + 4284^2 .

It is not a de Polignac number, because 25756497 - 2⁶ = 25756433 is a prime.

It is a super-2 number, since 2×25756497² = 1326794275422018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25756417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109954 + ... + 110187.

Almost surely, 2^25756497 is an apocalyptic number.

It is an amenable number.

25756497 is a deficient number, since it is larger than the sum of its proper divisors (14309347).

25756497 is a wasteful number, since it uses less digits than its factorization.

25756497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220160 (or 220157 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The square root of 25756497 is about 5075.0859106029. The cubic root of 25756497 is about 295.3218626241.

The spelling of 25756497 in words is "twenty-five million, seven hundred fifty-six thousand, four hundred ninety-seven".