25047891 has 18 divisors (see below), whose sum is σ = 39548028. Its totient is φ = 15150360.

The previous prime is 25047863. The next prime is 25047901. The reversal of 25047891 is 19874052.

It is not a de Polignac number, because 25047891 - 2⁵ = 25047859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25047811) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 49546 + ... + 50048.

Almost surely, 2^25047891 is an apocalyptic number.

25047891 is a deficient number, since it is larger than the sum of its proper divisors (14500137).

25047891 is an equidigital number, since it uses as much as digits as its factorization.

25047891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 25047891 is about 5004.7868086463. The cubic root of 25047891 is about 292.5883669016.

The spelling of 25047891 in words is "twenty-five million, forty-seven thousand, eight hundred ninety-one".