25857495 has 16 divisors (see below), whose sum is σ = 45969120. Its totient is φ = 13790592.

The previous prime is 25857431. The next prime is 25857509. The reversal of 25857495 is 59475852.

It is not a de Polignac number, because 25857495 - 2⁶ = 25857431 is a prime.

It is a super-2 number, since 2×25857495² = 1337220095350050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25857495.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95634 + ... + 95903.

It is an arithmetic number, because the mean of its divisors is an integer number (2873070).

Almost surely, 2^25857495 is an apocalyptic number.

25857495 is a deficient number, since it is larger than the sum of its proper divisors (20111625).

25857495 is a wasteful number, since it uses less digits than its factorization.

25857495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191551 (or 191545 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 25857495 is about 5085.0265486033. The cubic root of 25857495 is about 295.7073707388.

The spelling of 25857495 in words is "twenty-five million, eight hundred fifty-seven thousand, four hundred ninety-five".