11725571 has 16 divisors (see below), whose sum is σ = 13886208. Its totient is φ = 9760800.

The previous prime is 11725547. The next prime is 11725573. The reversal of 11725571 is 17552711.

11725571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11725571 - 2⁶ = 11725507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11725573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23636 + ... + 24126.

It is an arithmetic number, because the mean of its divisors is an integer number (867888).

Almost surely, 2^11725571 is an apocalyptic number.

11725571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11725571 is a deficient number, since it is larger than the sum of its proper divisors (2160637).

11725571 is a wasteful number, since it uses less digits than its factorization.

11725571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682.

The product of its digits is 2450, while the sum is 29.

The square root of 11725571 is about 3424.2621102947. The cubic root of 11725571 is about 227.1841351726.

The spelling of 11725571 in words is "eleven million, seven hundred twenty-five thousand, five hundred seventy-one".