25263921 has 8 divisors (see below), whose sum is σ = 35666784. Its totient is φ = 15851840.

The previous prime is 25263899. The next prime is 25263923. The reversal of 25263921 is 12936252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25263921 - 2⁷ = 25263793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25263923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247635 + ... + 247736.

It is an arithmetic number, because the mean of its divisors is an integer number (4458348).

Almost surely, 2^25263921 is an apocalyptic number.

It is an amenable number.

25263921 is a deficient number, since it is larger than the sum of its proper divisors (10402863).

25263921 is a wasteful number, since it uses less digits than its factorization.

25263921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495391.

The product of its digits is 6480, while the sum is 30.

The square root of 25263921 is about 5026.3228109623. The cubic root of 25263921 is about 293.4271203490.

The spelling of 25263921 in words is "twenty-five million, two hundred sixty-three thousand, nine hundred twenty-one".