1309131 has 6 divisors (see below), whose sum is σ = 1890980. Its totient is φ = 872748.

The previous prime is 1309129. The next prime is 1309163. The reversal of 1309131 is 1319031.

It is not a de Polignac number, because 1309131 - 2¹ = 1309129 is a prime.

It is a super-2 number, since 2×1309131² = 3427647950322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1309181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72721 + ... + 72738.

2^1309131 is an apocalyptic number.

1309131 is a deficient number, since it is larger than the sum of its proper divisors (581849).

1309131 is a wasteful number, since it uses less digits than its factorization.

1309131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145465 (or 145462 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 1309131 is about 1144.1726268357. The cubic root of 1309131 is about 109.3942182284.

It can be divided in two parts, 130 and 9131, that added together give a cube (9261 = 21³).

The spelling of 1309131 in words is "one million, three hundred nine thousand, one hundred thirty-one".