1339431 has 4 divisors (see below), whose sum is σ = 1785912. Its totient is φ = 892952.

The previous prime is 1339427. The next prime is 1339433. The reversal of 1339431 is 1349331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1339431 - 2² = 1339427 is a prime.

It is a super-2 number, since 2×1339431² = 3588150807522, which contains 22 as substring.

It is a D-number.

1339431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223236 + ... + 223241.

It is an arithmetic number, because the mean of its divisors is an integer number (446478).

2^1339431 is an apocalyptic number.

1339431 is a deficient number, since it is larger than the sum of its proper divisors (446481).

1339431 is an equidigital number, since it uses as much as digits as its factorization.

1339431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446480.

The product of its digits is 972, while the sum is 24.

The square root of 1339431 is about 1157.3378936162. The cubic root of 1339431 is about 110.2317702697.

It can be divided in two parts, 1339 and 431, that added together give a triangular number (1770 = T₅₉).

The spelling of 1339431 in words is "one million, three hundred thirty-nine thousand, four hundred thirty-one".