25442530 has 8 divisors (see below), whose sum is σ = 45796572. Its totient is φ = 10177008.

The previous prime is 25442497. The next prime is 25442563. The reversal of 25442530 is 3524452.

It is an interprime number because it is at equal distance from previous prime (25442497) and next prime (25442563).

It can be written as a sum of positive squares in 2 ways, for example, as 20875761 + 4566769 = 4569^2 + 2137^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 25442495 and 25442504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272117 + ... + 1272136.

Almost surely, 2^25442530 is an apocalyptic number.

25442530 is a deficient number, since it is larger than the sum of its proper divisors (20354042).

25442530 is a wasteful number, since it uses less digits than its factorization.

25442530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544260.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 25442530 is about 5044.0588814961. The cubic root of 25442530 is about 294.1169803044.

Adding to 25442530 its reverse (3524452), we get a palindrome (28966982).

The spelling of 25442530 in words is "twenty-five million, four hundred forty-two thousand, five hundred thirty".