25725157 has 4 divisors (see below), whose sum is σ = 25807660. Its totient is φ = 25642656.

The previous prime is 25725151. The next prime is 25725169. The reversal of 25725157 is 75152752.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3437316 + 22287841 = 1854^2 + 4721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25725157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25725151) 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, 40782 + ... + 41407.

It is an arithmetic number, because the mean of its divisors is an integer number (6451915).

Almost surely, 2^25725157 is an apocalyptic number.

It is an amenable number.

25725157 is a deficient number, since it is larger than the sum of its proper divisors (82503).

25725157 is an equidigital number, since it uses as much as digits as its factorization.

25725157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82502.

The product of its digits is 24500, while the sum is 34.

The square root of 25725157 is about 5071.9973383274. The cubic root of 25725157 is about 295.2020333937.

The spelling of 25725157 in words is "twenty-five million, seven hundred twenty-five thousand, one hundred fifty-seven".