25171923 has 16 divisors (see below), whose sum is σ = 38497536. Its totient is φ = 14331360.

The previous prime is 25171901. The next prime is 25171943. The reversal of 25171923 is 32917152.

It is not a de Polignac number, because 25171923 - 2⁵ = 25171891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25171943) 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 in 15 ways as a sum of consecutive naturals, for example, 4108 + ... + 8198.

It is an arithmetic number, because the mean of its divisors is an integer number (2406096).

Almost surely, 2^25171923 is an apocalyptic number.

25171923 is a deficient number, since it is larger than the sum of its proper divisors (13325613).

25171923 is a wasteful number, since it uses less digits than its factorization.

25171923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394.

The product of its digits is 3780, while the sum is 30.

The square root of 25171923 is about 5017.1628436797. The cubic root of 25171923 is about 293.0705177253.

The spelling of 25171923 in words is "twenty-five million, one hundred seventy-one thousand, nine hundred twenty-three".