11815025 has 24 divisors (see below), whose sum is σ = 15394104. Its totient is φ = 8985600.

The previous prime is 11815019. The next prime is 11815033. The reversal of 11815025 is 52051811.

It can be written as a sum of positive squares in 12 ways, for example, as 43264 + 11771761 = 208^2 + 3431^2 .

It is not a de Polignac number, because 11815025 - 2⁴ = 11815009 is a prime.

It is a Duffinian number.

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, 48905 + ... + 49145.

It is an arithmetic number, because the mean of its divisors is an integer number (641421).

Almost surely, 2^11815025 is an apocalyptic number.

It is an amenable number.

11815025 is a deficient number, since it is larger than the sum of its proper divisors (3579079).

11815025 is a wasteful number, since it uses less digits than its factorization.

11815025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 11815025 is about 3437.2990850376. The cubic root of 11815025 is about 227.7603990090.

Adding to 11815025 its reverse (52051811), we get a palindrome (63866836).

The spelling of 11815025 in words is "eleven million, eight hundred fifteen thousand, twenty-five".