1131284877 has 16 divisors (see below), whose sum is σ = 1607454720. Its totient is φ = 706048112.

The previous prime is 1131284863. The next prime is 1131284993. The reversal of 1131284877 is 7784821311.

It is a de Polignac number, because none of the positive numbers 2^k-1131284877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131284857) 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, 171177 + ... + 177662.

It is an arithmetic number, because the mean of its divisors is an integer number (100465920).

Almost surely, 2^1131284877 is an apocalyptic number.

It is an amenable number.

1131284877 is a deficient number, since it is larger than the sum of its proper divisors (476169843).

1131284877 is a wasteful number, since it uses less digits than its factorization.

1131284877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348912.

The product of its digits is 75264, while the sum is 42.

The square root of 1131284877 is about 33634.5785910869. The cubic root of 1131284877 is about 1041.9750673433.

The spelling of 1131284877 in words is "one billion, one hundred thirty-one million, two hundred eighty-four thousand, eight hundred seventy-seven".