25830157 has 4 divisors (see below), whose sum is σ = 27349596. Its totient is φ = 24310720.

The previous prime is 25830151. The next prime is 25830163. The reversal of 25830157 is 75103852.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25830151) and next prime (25830163).

It can be written as a sum of positive squares in 2 ways, for example, as 21288996 + 4541161 = 4614^2 + 2131^2 .

It is a cyclic number.

It is not a de Polignac number, because 25830157 - 2⁷ = 25830029 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25830151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759694 + ... + 759727.

It is an arithmetic number, because the mean of its divisors is an integer number (6837399).

Almost surely, 2^25830157 is an apocalyptic number.

It is an amenable number.

25830157 is a deficient number, since it is larger than the sum of its proper divisors (1519439).

25830157 is a wasteful number, since it uses less digits than its factorization.

25830157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519438.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 25830157 is about 5082.3377495007. The cubic root of 25830157 is about 295.6031211618.

The spelling of 25830157 in words is "twenty-five million, eight hundred thirty thousand, one hundred fifty-seven".