25297042 has 4 divisors (see below), whose sum is σ = 37945566. Its totient is φ = 12648520.

The previous prime is 25297031. The next prime is 25297057. The reversal of 25297042 is 24079252.

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

It can be written as a sum of positive squares in only one way, i.e., 24295041 + 1002001 = 4929^2 + 1001^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 25296995 and 25297013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324259 + ... + 6324262.

Almost surely, 2^25297042 is an apocalyptic number.

25297042 is a deficient number, since it is larger than the sum of its proper divisors (12648524).

25297042 is a wasteful number, since it uses less digits than its factorization.

25297042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12648523.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 25297042 is about 5029.6164863735. The cubic root of 25297042 is about 293.5552920043. Note that the first 3 decimals are identical.

The spelling of 25297042 in words is "twenty-five million, two hundred ninety-seven thousand, forty-two".