1431139 has 2 divisors, whose sum is σ = 1431140. Its totient is φ = 1431138.

The previous prime is 1431127. The next prime is 1431149. The reversal of 1431139 is 9311341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1431139 - 2⁵ = 1431107 is a prime.

It is a Chen prime.

1431139 is a lucky number.

It is equal to p₁₀₉₂₈₂ and since 1431139 and 109282 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 (1431119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715569 + 715570.

It is an arithmetic number, because the mean of its divisors is an integer number (715570).

2^1431139 is an apocalyptic number.

1431139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431139 is an equidigital number, since it uses as much as digits as its factorization.

1431139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 22.

The square root of 1431139 is about 1196.3022193409. The cubic root of 1431139 is about 112.6922211718.

The spelling of 1431139 in words is "one million, four hundred thirty-one thousand, one hundred thirty-nine".