1431439 has 2 divisors, whose sum is σ = 1431440. Its totient is φ = 1431438.

The previous prime is 1431421. The next prime is 1431449. The reversal of 1431439 is 9341341.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1431439 - 2¹⁷ = 1300367 is a prime.

It is a super-2 number, since 2×1431439² = 4098035221442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715719 + 715720.

It is an arithmetic number, because the mean of its divisors is an integer number (715720).

2^1431439 is an apocalyptic number.

1431439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431439 is an equidigital number, since it uses as much as digits as its factorization.

1431439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 1431439 is about 1196.4275991467. The cubic root of 1431439 is about 112.7000949247.

The spelling of 1431439 in words is "one million, four hundred thirty-one thousand, four hundred thirty-nine".