25630042 has 16 divisors (see below), whose sum is σ = 39263400. Its totient is φ = 12545280.

The previous prime is 25630039. The next prime is 25630057. The reversal of 25630042 is 24003652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24591681 + 1038361 = 4959^2 + 1019^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25629995 and 25630022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18742 + ... + 20062.

Almost surely, 2^25630042 is an apocalyptic number.

25630042 is a deficient number, since it is larger than the sum of its proper divisors (13633358).

25630042 is a wasteful number, since it uses less digits than its factorization.

25630042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 25630042 is about 5062.6121715968. The cubic root of 25630042 is about 294.8377619842.

Adding to 25630042 its reverse (24003652), we get a palindrome (49633694).

The spelling of 25630042 in words is "twenty-five million, six hundred thirty thousand, forty-two".