25042631 has 4 divisors (see below), whose sum is σ = 25906200. Its totient is φ = 24179064.

The previous prime is 25042621. The next prime is 25042639. The reversal of 25042631 is 13624052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25042631 - 2¹⁰ = 25041607 is a prime.

It is a super-2 number, since 2×25042631² = 1254266734804322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25042597 and 25042606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25042639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431741 + ... + 431798.

It is an arithmetic number, because the mean of its divisors is an integer number (6476550).

Almost surely, 2^25042631 is an apocalyptic number.

25042631 is a deficient number, since it is larger than the sum of its proper divisors (863569).

25042631 is an equidigital number, since it uses as much as digits as its factorization.

25042631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863568.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 25042631 is about 5004.2612841457. The cubic root of 25042631 is about 292.5678845044.

Adding to 25042631 its reverse (13624052), we get a palindrome (38666683).

The spelling of 25042631 in words is "twenty-five million, forty-two thousand, six hundred thirty-one".