1131279 has 16 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 703296.

The previous prime is 1131271. The next prime is 1131307. The reversal of 1131279 is 9721311.

It is not a de Polignac number, because 1131279 - 2³ = 1131271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131271) 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, 4962 + ... + 5184.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2^1131279 is an apocalyptic number.

1131279 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1131279 is a deficient number, since it is larger than the sum of its proper divisors (481521).

1131279 is a wasteful number, since it uses less digits than its factorization.

1131279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334.

The product of its digits is 378, while the sum is 24.

The square root of 1131279 is about 1063.6160021361. The cubic root of 1131279 is about 104.1973262994.

The spelling of 1131279 in words is "one million, one hundred thirty-one thousand, two hundred seventy-nine".