25264491 has 16 divisors (see below), whose sum is σ = 38805504. Its totient is φ = 14321664.

The previous prime is 25264469. The next prime is 25264493. The reversal of 25264491 is 19446252.

It is not a de Polignac number, because 25264491 - 2¹⁰ = 25263467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25264493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2070 + ... + 7403.

It is an arithmetic number, because the mean of its divisors is an integer number (2425344).

Almost surely, 2^25264491 is an apocalyptic number.

25264491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25264491 is a deficient number, since it is larger than the sum of its proper divisors (13541013).

25264491 is a wasteful number, since it uses less digits than its factorization.

25264491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9610.

The product of its digits is 17280, while the sum is 33.

The square root of 25264491 is about 5026.3795121340. The cubic root of 25264491 is about 293.4293270823.

The spelling of 25264491 in words is "twenty-five million, two hundred sixty-four thousand, four hundred ninety-one".