25297138 has 4 divisors (see below), whose sum is σ = 37945710. Its totient is φ = 12648568.

The previous prime is 25297117. The next prime is 25297141. The reversal of 25297138 is 83179252.

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., 19474569 + 5822569 = 4413^2 + 2413^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25297097 and 25297106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324283 + ... + 6324286.

Almost surely, 2^25297138 is an apocalyptic number.

25297138 is a deficient number, since it is larger than the sum of its proper divisors (12648572).

25297138 is a wasteful number, since it uses less digits than its factorization.

25297138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12648571.

The product of its digits is 30240, while the sum is 37.

The square root of 25297138 is about 5029.6260298356. The cubic root of 25297138 is about 293.5556633424. Note that the first 3 decimals are identical.

It can be divided in two parts, 252971 and 38, that added together give a square (253009 = 503²).

The spelling of 25297138 in words is "twenty-five million, two hundred ninety-seven thousand, one hundred thirty-eight".