11557011 has 4 divisors (see below), whose sum is σ = 15409352. Its totient is φ = 7704672.

The previous prime is 11556983. The next prime is 11557037. The reversal of 11557011 is 11075511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11557011 - 2⁶ = 11556947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11557081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1926166 + ... + 1926171.

It is an arithmetic number, because the mean of its divisors is an integer number (3852338).

Almost surely, 2^11557011 is an apocalyptic number.

11557011 is a deficient number, since it is larger than the sum of its proper divisors (3852341).

11557011 is an equidigital number, since it uses as much as digits as its factorization.

11557011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3852340.

The product of its (nonzero) digits is 175, while the sum is 21.

The square root of 11557011 is about 3399.5604127593. The cubic root of 11557011 is about 226.0902542381.

The spelling of 11557011 in words is "eleven million, five hundred fifty-seven thousand, eleven".