25634505 has 32 divisors (see below), whose sum is σ = 45126144. Its totient is φ = 12347136.

The previous prime is 25634503. The next prime is 25634509. The reversal of 25634505 is 50543652.

It is not a de Polignac number, because 25634505 - 2¹ = 25634503 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (25634503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7767 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (1410192).

Almost surely, 2^25634505 is an apocalyptic number.

It is an amenable number.

25634505 is a deficient number, since it is larger than the sum of its proper divisors (19491639).

25634505 is a wasteful number, since it uses less digits than its factorization.

25634505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 25634505 is about 5063.0529327669. The cubic root of 25634505 is about 294.8548745139.

The spelling of 25634505 in words is "twenty-five million, six hundred thirty-four thousand, five hundred five".