1131864 has 16 divisors (see below), whose sum is σ = 2829720. Its totient is φ = 377280.

The previous prime is 1131863. The next prime is 1131869. The reversal of 1131864 is 4681311.

It is a super-2 number, since 2×1131864² = 2562232228992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 47161 = 1131864 / (1 + 1 + 3 + 1 + 8 + 6 + 4).

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131863) 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, 23557 + ... + 23604.

2^1131864 is an apocalyptic number.

It is an amenable number.

1131864 is an abundant number, since it is smaller than the sum of its proper divisors (1697856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131864 is a wasteful number, since it uses less digits than its factorization.

1131864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47170 (or 47166 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 1131864 is about 1063.8909718575. The cubic root of 1131864 is about 104.2152838301.

The spelling of 1131864 in words is "one million, one hundred thirty-one thousand, eight hundred sixty-four".