25641953 has 6 divisors (see below), whose sum is σ = 25904034. Its totient is φ = 25382496.

The previous prime is 25641943. The next prime is 25641961. The reversal of 25641953 is 35914652.

It can be written as a sum of positive squares in only one way, i.e., 25472209 + 169744 = 5047^2 + 412^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25641953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25641943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9401 + ... + 11817.

It is an arithmetic number, because the mean of its divisors is an integer number (4317339).

Almost surely, 2^25641953 is an apocalyptic number.

It is an amenable number.

25641953 is a deficient number, since it is larger than the sum of its proper divisors (262081).

25641953 is an equidigital number, since it uses as much as digits as its factorization.

25641953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623 (or 2520 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 25641953 is about 5063.7884039521. The cubic root of 25641953 is about 294.8834280391.

The spelling of 25641953 in words is "twenty-five million, six hundred forty-one thousand, nine hundred fifty-three".