1392539 has 2 divisors, whose sum is σ = 1392540. Its totient is φ = 1392538.

The previous prime is 1392527. The next prime is 1392541. The reversal of 1392539 is 9352931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1392539 - 2²⁰ = 343963 is a prime.

Together with 1392541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1394539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696269 + 696270.

It is an arithmetic number, because the mean of its divisors is an integer number (696270).

2^1392539 is an apocalyptic number.

1392539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392539 is an equidigital number, since it uses as much as digits as its factorization.

1392539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 32.

The square root of 1392539 is about 1180.0588968352. The cubic root of 1392539 is about 111.6698130348.

The spelling of 1392539 in words is "one million, three hundred ninety-two thousand, five hundred thirty-nine".