1392561 has 12 divisors (see below), whose sum is σ = 2021760. Its totient is φ = 923640.

The previous prime is 1392557. The next prime is 1392607. The reversal of 1392561 is 1652931.

1392561 is a `hidden beast` number, since 13 + 92 + 561 = 666.

It is not a de Polignac number, because 1392561 - 2² = 1392557 is a prime.

It is a super-2 number, since 2×1392561² = 3878452277442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1392541) 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, 3016 + ... + 3446.

It is an arithmetic number, because the mean of its divisors is an integer number (168480).

2^1392561 is an apocalyptic number.

It is an amenable number.

1392561 is a deficient number, since it is larger than the sum of its proper divisors (629199).

1392561 is a wasteful number, since it uses less digits than its factorization.

1392561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 793 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1392561 is about 1180.0682183671. The cubic root of 1392561 is about 111.6704011028.

It can be divided in two parts, 1392 and 561, that added together give a triangular number (1953 = T₆₂).

The spelling of 1392561 in words is "one million, three hundred ninety-two thousand, five hundred sixty-one".