25240155 has 16 divisors (see below), whose sum is σ = 42760224. Its totient is φ = 12669440.

The previous prime is 25240139. The next prime is 25240207. The reversal of 25240155 is 55104252.

It is a happy number.

It is not a de Polignac number, because 25240155 - 2⁴ = 25240139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49236 + ... + 49745.

It is an arithmetic number, because the mean of its divisors is an integer number (2672514).

Almost surely, 2^25240155 is an apocalyptic number.

25240155 is a deficient number, since it is larger than the sum of its proper divisors (17520069).

25240155 is a wasteful number, since it uses less digits than its factorization.

25240155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99006.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 25240155 is about 5023.9581009399. The cubic root of 25240155 is about 293.3350816298.

The spelling of 25240155 in words is "twenty-five million, two hundred forty thousand, one hundred fifty-five".