1392857 has 6 divisors (see below), whose sum is σ = 1456602. Its totient is φ = 1331792.

The previous prime is 1392851. The next prime is 1392877. The reversal of 1392857 is 7582931.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 414736 = 989^2 + 644^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1392857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1392851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 788 + ... + 1845.

It is an arithmetic number, because the mean of its divisors is an integer number (242767).

2^1392857 is an apocalyptic number.

It is an amenable number.

1392857 is a deficient number, since it is larger than the sum of its proper divisors (63745).

1392857 is an equidigital number, since it uses as much as digits as its factorization.

1392857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679 (or 2656 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 1392857 is about 1180.1936281814. The cubic root of 1392857 is about 111.6783126885.

The spelling of 1392857 in words is "one million, three hundred ninety-two thousand, eight hundred fifty-seven".