25120155 has 32 divisors (see below), whose sum is σ = 41333760. Its totient is φ = 13023360.

The previous prime is 25120141. The next prime is 25120171. The reversal of 25120155 is 55102152.

It is not a de Polignac number, because 25120155 - 2⁶ = 25120091 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109581 + ... + 109809.

It is an arithmetic number, because the mean of its divisors is an integer number (1291680).

Almost surely, 2^25120155 is an apocalyptic number.

25120155 is a deficient number, since it is larger than the sum of its proper divisors (16213605).

25120155 is a wasteful number, since it uses less digits than its factorization.

25120155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 25120155 is about 5012.0010973662. The cubic root of 25120155 is about 292.8694724703.

The spelling of 25120155 in words is "twenty-five million, one hundred twenty thousand, one hundred fifty-five".