25379505 has 24 divisors (see below), whose sum is σ = 44141760. Its totient is φ = 13489440.

The previous prime is 25379489. The next prime is 25379531. The reversal of 25379505 is 50597352.

It is not a de Polignac number, because 25379505 - 2⁴ = 25379489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25379505.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15370 + ... + 16940.

It is an arithmetic number, because the mean of its divisors is an integer number (1839240).

Almost surely, 2^25379505 is an apocalyptic number.

It is an amenable number.

25379505 is a deficient number, since it is larger than the sum of its proper divisors (18762255).

25379505 is a wasteful number, since it uses less digits than its factorization.

25379505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 36.

The square root of 25379505 is about 5037.8075588494. The cubic root of 25379505 is about 293.8739220620.

The spelling of 25379505 in words is "twenty-five million, three hundred seventy-nine thousand, five hundred five".