1392531 has 12 divisors (see below), whose sum is σ = 2160072. Its totient is φ = 795648.

The previous prime is 1392527. The next prime is 1392539. The reversal of 1392531 is 1352931.

It is a happy number.

It is not a de Polignac number, because 1392531 - 2² = 1392527 is a prime.

It is a super-2 number, since 2×1392531² = 3878285171922, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1392539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4590 + ... + 4883.

It is an arithmetic number, because the mean of its divisors is an integer number (180006).

2^1392531 is an apocalyptic number.

1392531 is a deficient number, since it is larger than the sum of its proper divisors (767541).

1392531 is an equidigital number, since it uses as much as digits as its factorization.

1392531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9490 (or 9483 counting only the distinct ones).

The product of its digits is 810, while the sum is 24.

The square root of 1392531 is about 1180.0555071690. The cubic root of 1392531 is about 111.6695991903.

The spelling of 1392531 in words is "one million, three hundred ninety-two thousand, five hundred thirty-one".