25744531 has 2 divisors, whose sum is σ = 25744532. Its totient is φ = 25744530.

The previous prime is 25744519. The next prime is 25744561. The reversal of 25744531 is 13544752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25744531 - 2¹³ = 25736339 is a prime.

It is a super-2 number, since 2×25744531² = 1325561752819922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25744493 and 25744502.

It is not a weakly prime, because it can be changed into another prime (25744561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12872265 + 12872266.

It is an arithmetic number, because the mean of its divisors is an integer number (12872266).

Almost surely, 2^25744531 is an apocalyptic number.

25744531 is a deficient number, since it is larger than the sum of its proper divisors (1).

25744531 is an equidigital number, since it uses as much as digits as its factorization.

25744531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 25744531 is about 5073.9068773481. The cubic root of 25744531 is about 295.2761218181.

The spelling of 25744531 in words is "twenty-five million, seven hundred forty-four thousand, five hundred thirty-one".