25758161 has 32 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 20462400.

The previous prime is 25758151. The next prime is 25758163. The reversal of 25758161 is 16185752.

It is a cyclic number.

It is not a de Polignac number, because 25758161 - 2⁶ = 25758097 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (25758163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 362756 + ... + 362826.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^25758161 is an apocalyptic number.

It is an amenable number.

25758161 is a deficient number, since it is larger than the sum of its proper divisors (6175279).

25758161 is a wasteful number, since it uses less digits than its factorization.

25758161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its digits is 16800, while the sum is 35.

The square root of 25758161 is about 5075.2498460667. The cubic root of 25758161 is about 295.3282222493.

The spelling of 25758161 in words is "twenty-five million, seven hundred fifty-eight thousand, one hundred sixty-one".