25290842 has 16 divisors (see below), whose sum is σ = 39414600. Its totient is φ = 12156480.

The previous prime is 25290833. The next prime is 25290877. The reversal of 25290842 is 24809252.

It is a Cunningham number, because it is equal to 5029²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 19439281 + 5851561 = 4409^2 + 2419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25290799 and 25290808.

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, 14792 + ... + 16412.

Almost surely, 2^25290842 is an apocalyptic number.

25290842 is a deficient number, since it is larger than the sum of its proper divisors (14123758).

25290842 is a wasteful number, since it uses less digits than its factorization.

25290842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 25290842 is about 5029.0000994233. Note that the first 4 decimals coincide. The cubic root of 25290842 is about 293.5313077571.

The spelling of 25290842 in words is "twenty-five million, two hundred ninety thousand, eight hundred forty-two".