11157861 has 32 divisors (see below), whose sum is σ = 18063360. Its totient is φ = 6033600.

The previous prime is 11157827. The next prime is 11157869. The reversal of 11157861 is 16875111.

It is not a de Polignac number, because 11157861 - 2¹⁰ = 11156837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11157869) 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, 12880 + ... + 13718.

It is an arithmetic number, because the mean of its divisors is an integer number (564480).

Almost surely, 2^11157861 is an apocalyptic number.

11157861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11157861 is a deficient number, since it is larger than the sum of its proper divisors (6905499).

11157861 is a wasteful number, since it uses less digits than its factorization.

11157861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897.

The product of its digits is 1680, while the sum is 30.

The square root of 11157861 is about 3340.3384559053. The cubic root of 11157861 is about 223.4568379533.

The spelling of 11157861 in words is "eleven million, one hundred fifty-seven thousand, eight hundred sixty-one".