1392557 has 2 divisors, whose sum is σ = 1392558. Its totient is φ = 1392556.

The previous prime is 1392553. The next prime is 1392607. The reversal of 1392557 is 7552931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1371241 + 21316 = 1171^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392557 - 2² = 1392553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1392553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696278 + 696279.

It is an arithmetic number, because the mean of its divisors is an integer number (696279).

2^1392557 is an apocalyptic number.

It is an amenable number.

1392557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392557 is an equidigital number, since it uses as much as digits as its factorization.

1392557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9450, while the sum is 32.

The square root of 1392557 is about 1180.0665235486. The cubic root of 1392557 is about 111.6702941818.

The spelling of 1392557 in words is "one million, three hundred ninety-two thousand, five hundred fifty-seven".