25012591 has 2 divisors, whose sum is σ = 25012592. Its totient is φ = 25012590.

The previous prime is 25012577. The next prime is 25012597. The reversal of 25012591 is 19521052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25012591 - 2⁹ = 25012079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25012597) 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, 12506295 + 12506296.

It is an arithmetic number, because the mean of its divisors is an integer number (12506296).

Almost surely, 2^25012591 is an apocalyptic number.

25012591 is a deficient number, since it is larger than the sum of its proper divisors (1).

25012591 is an equidigital number, since it uses as much as digits as its factorization.

25012591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 25012591 is about 5001.2589415066. The cubic root of 25012591 is about 292.4508539924.

The spelling of 25012591 in words is "twenty-five million, twelve thousand, five hundred ninety-one".