25266157 has 4 divisors (see below), whose sum is σ = 28875616. Its totient is φ = 21656700.

The previous prime is 25266151. The next prime is 25266173. The reversal of 25266157 is 75166252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25266157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25266151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1804719 + ... + 1804732.

It is an arithmetic number, because the mean of its divisors is an integer number (7218904).

Almost surely, 2^25266157 is an apocalyptic number.

It is an amenable number.

25266157 is a deficient number, since it is larger than the sum of its proper divisors (3609459).

25266157 is an equidigital number, since it uses as much as digits as its factorization.

25266157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609458.

The product of its digits is 25200, while the sum is 34.

The square root of 25266157 is about 5026.5452350496. The cubic root of 25266157 is about 293.4357767473.

The spelling of 25266157 in words is "twenty-five million, two hundred sixty-six thousand, one hundred fifty-seven".