1131955 has 12 divisors (see below), whose sum is σ = 1493856. Its totient is φ = 822800.

The previous prime is 1131943. The next prime is 1131959. The reversal of 1131955 is 5591311.

It is not a de Polignac number, because 1131955 - 2⁷ = 1131827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

2^1131955 is an apocalyptic number.

1131955 is a deficient number, since it is larger than the sum of its proper divisors (361901).

1131955 is a wasteful number, since it uses less digits than its factorization.

1131955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898 (or 1887 counting only the distinct ones).

The product of its digits is 675, while the sum is 25.

The square root of 1131955 is about 1063.9337385383. The cubic root of 1131955 is about 104.2180766676.

The spelling of 1131955 in words is "one million, one hundred thirty-one thousand, nine hundred fifty-five".