25405065 has 24 divisors (see below), whose sum is σ = 50326848. Its totient is φ = 11613600.

The previous prime is 25405049. The next prime is 25405067. The reversal of 25405065 is 56050452.

It is not a de Polignac number, because 25405065 - 2⁴ = 25405049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25405067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40011 + ... + 40640.

It is an arithmetic number, because the mean of its divisors is an integer number (2096952).

Almost surely, 2^25405065 is an apocalyptic number.

It is an amenable number.

25405065 is a deficient number, since it is larger than the sum of its proper divisors (24921783).

25405065 is a wasteful number, since it uses less digits than its factorization.

25405065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80669 (or 80666 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 25405065 is about 5040.3437382782. The cubic root of 25405065 is about 293.9725435973.

The spelling of 25405065 in words is "twenty-five million, four hundred five thousand, sixty-five".