11557975 has 48 divisors (see below), whose sum is σ = 17436384. Its totient is φ = 7488000.

The previous prime is 11557963. The next prime is 11557981. The reversal of 11557975 is 57975511.

11557975 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11557975 - 2¹⁵ = 11525207 is a prime.

It is a super-2 number, since 2×11557975² = 267173572201250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 189445 + ... + 189505.

It is an arithmetic number, because the mean of its divisors is an integer number (363258).

Almost surely, 2^11557975 is an apocalyptic number.

11557975 is a deficient number, since it is larger than the sum of its proper divisors (5878409).

11557975 is a wasteful number, since it uses less digits than its factorization.

11557975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 143 counting only the distinct ones).

The product of its digits is 55125, while the sum is 40.

The square root of 11557975 is about 3399.7021928398. The cubic root of 11557975 is about 226.0965403198.

The spelling of 11557975 in words is "eleven million, five hundred fifty-seven thousand, nine hundred seventy-five".