25405155 has 24 divisors (see below), whose sum is σ = 44242848. Its totient is φ = 13485696.

The previous prime is 25405141. The next prime is 25405181. The reversal of 25405155 is 55150452.

It is not a de Polignac number, because 25405155 - 2⁶ = 25405091 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9274 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (1843452).

Almost surely, 2^25405155 is an apocalyptic number.

25405155 is a deficient number, since it is larger than the sum of its proper divisors (18837693).

25405155 is a wasteful number, since it uses less digits than its factorization.

25405155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 25405155 is about 5040.3526662328. The cubic root of 25405155 is about 293.9728907393.

The spelling of 25405155 in words is "twenty-five million, four hundred five thousand, one hundred fifty-five".