25157345 has 4 divisors (see below), whose sum is σ = 30188820. Its totient is φ = 20125872.

The previous prime is 25157323. The next prime is 25157389. The reversal of 25157345 is 54375152.

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 15429184 + 9728161 = 3928^2 + 3119^2 .

It is a cyclic number.

It is not a de Polignac number, because 25157345 - 2⁶ = 25157281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2515730 + ... + 2515739.

It is an arithmetic number, because the mean of its divisors is an integer number (7547205).

Almost surely, 2^25157345 is an apocalyptic number.

It is an amenable number.

25157345 is a deficient number, since it is larger than the sum of its proper divisors (5031475).

25157345 is an equidigital number, since it uses as much as digits as its factorization.

25157345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5031474.

The product of its digits is 21000, while the sum is 32.

The square root of 25157345 is about 5015.7098201551. The cubic root of 25157345 is about 293.0139307754.

The spelling of 25157345 in words is "twenty-five million, one hundred fifty-seven thousand, three hundred forty-five".