25634242 has 16 divisors (see below), whose sum is σ = 39168792. Its totient is φ = 12579840.

The previous prime is 25634239. The next prime is 25634251. The reversal of 25634242 is 24243652.

It can be written as a sum of positive squares in 4 ways, for example, as 17732521 + 7901721 = 4211^2 + 2811^2 .

It is a super-2 number, since 2×25634242² = 1314228725829128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25634242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48942 + ... + 49462.

Almost surely, 2^25634242 is an apocalyptic number.

25634242 is a deficient number, since it is larger than the sum of its proper divisors (13534550).

25634242 is a wasteful number, since it uses less digits than its factorization.

25634242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933.

The product of its digits is 11520, while the sum is 28.

The square root of 25634242 is about 5063.0269602284. The cubic root of 25634242 is about 294.8538661452.

Adding to 25634242 its reverse (24243652), we get a palindrome (49877894).

The spelling of 25634242 in words is "twenty-five million, six hundred thirty-four thousand, two hundred forty-two".