25265021 has 2 divisors, whose sum is σ = 25265022. Its totient is φ = 25265020.

The previous prime is 25265011. The next prime is 25265027. The reversal of 25265021 is 12056252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 5808100 = 4411^2 + 2410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25265021 is a prime.

It is a super-2 number, since 2×25265021² = 1276642572260882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25265027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12632510 + 12632511.

It is an arithmetic number, because the mean of its divisors is an integer number (12632511).

Almost surely, 2^25265021 is an apocalyptic number.

It is an amenable number.

25265021 is a deficient number, since it is larger than the sum of its proper divisors (1).

25265021 is an equidigital number, since it uses as much as digits as its factorization.

25265021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 25265021 is about 5026.4322337022. The cubic root of 25265021 is about 293.4313789272.

The spelling of 25265021 in words is "twenty-five million, two hundred sixty-five thousand, twenty-one".