25129797 has 24 divisors (see below), whose sum is σ = 42522912. Its totient is φ = 13053600.

The previous prime is 25129787. The next prime is 25129801. The reversal of 25129797 is 79792152.

It is not a de Polignac number, because 25129797 - 2⁴ = 25129781 is a prime.

It is a super-2 number, since 2×25129797² = 1263013394522418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25129787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6154 + ... + 9387.

It is an arithmetic number, because the mean of its divisors is an integer number (1771788).

Almost surely, 2^25129797 is an apocalyptic number.

It is an amenable number.

25129797 is a deficient number, since it is larger than the sum of its proper divisors (17393115).

25129797 is a wasteful number, since it uses less digits than its factorization.

25129797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15569 (or 15562 counting only the distinct ones).

The product of its digits is 79380, while the sum is 42.

The square root of 25129797 is about 5012.9628963319. The cubic root of 25129797 is about 292.9069388824.

The spelling of 25129797 in words is "twenty-five million, one hundred twenty-nine thousand, seven hundred ninety-seven".