1329131 has 2 divisors, whose sum is σ = 1329132. Its totient is φ = 1329130.

The previous prime is 1329127. The next prime is 1329143. The reversal of 1329131 is 1319231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1329131 - 2² = 1329127 is a prime.

It is a super-2 number, since 2×1329131² = 3533178430322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₁₀₂₀₈₉ and since 1329131 and 102089 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1329161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664565 + 664566.

It is an arithmetic number, because the mean of its divisors is an integer number (664566).

2^1329131 is an apocalyptic number.

1329131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329131 is an equidigital number, since it uses as much as digits as its factorization.

1329131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

The square root of 1329131 is about 1152.8794386231. The cubic root of 1329131 is about 109.9484882781.

The spelling of 1329131 in words is "one million, three hundred twenty-nine thousand, one hundred thirty-one".