25264139 has 4 divisors (see below), whose sum is σ = 25274256. Its totient is φ = 25254024.

The previous prime is 25264123. The next prime is 25264153. The reversal of 25264139 is 93146252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25264139 - 2⁴ = 25264123 is a prime.

It is a super-2 number, since 2×25264139² = 1276553438822642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25264739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1682 + ... + 7304.

It is an arithmetic number, because the mean of its divisors is an integer number (6318564).

Almost surely, 2^25264139 is an apocalyptic number.

25264139 is a deficient number, since it is larger than the sum of its proper divisors (10117).

25264139 is an equidigital number, since it uses as much as digits as its factorization.

25264139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10116.

The product of its digits is 12960, while the sum is 32.

The square root of 25264139 is about 5026.3444967491. The cubic root of 25264139 is about 293.4279643316.

The spelling of 25264139 in words is "twenty-five million, two hundred sixty-four thousand, one hundred thirty-nine".