25624537 has 2 divisors, whose sum is σ = 25624538. Its totient is φ = 25624536.

The previous prime is 25624531. The next prime is 25624561. The reversal of 25624537 is 73542652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25613721 + 10816 = 5061^2 + 104^2 .

It is a cyclic number.

It is not a de Polignac number, because 25624537 - 2¹⁹ = 25100249 is a prime.

It is not a weakly prime, because it can be changed into another prime (25624531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12812268 + 12812269.

It is an arithmetic number, because the mean of its divisors is an integer number (12812269).

Almost surely, 2^25624537 is an apocalyptic number.

It is an amenable number.

25624537 is a deficient number, since it is larger than the sum of its proper divisors (1).

25624537 is an equidigital number, since it uses as much as digits as its factorization.

25624537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 34.

The square root of 25624537 is about 5062.0684507422. The cubic root of 25624537 is about 294.8166513659.

The spelling of 25624537 in words is "twenty-five million, six hundred twenty-four thousand, five hundred thirty-seven".