1345439 has 4 divisors (see below), whose sum is σ = 1352400. Its totient is φ = 1338480.

The previous prime is 1345423. The next prime is 1345441. The reversal of 1345439 is 9345431.

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 1345439 - 2⁴ = 1345423 is a prime.

It is a super-2 number, since 2×1345439² = 3620412205442, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345139) 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, 3182 + ... + 3579.

It is an arithmetic number, because the mean of its divisors is an integer number (338100).

2^1345439 is an apocalyptic number.

1345439 is a deficient number, since it is larger than the sum of its proper divisors (6961).

1345439 is an equidigital number, since it uses as much as digits as its factorization.

1345439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960.

The product of its digits is 6480, while the sum is 29.

The square root of 1345439 is about 1159.9306013723. The cubic root of 1345439 is about 110.3963388392.

The spelling of 1345439 in words is "one million, three hundred forty-five thousand, four hundred thirty-nine".