1392817 has 2 divisors, whose sum is σ = 1392818. Its totient is φ = 1392816.

The previous prime is 1392803. The next prime is 1392829. The reversal of 1392817 is 7182931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1083681 + 309136 = 1041^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392817 - 2¹⁵ = 1360049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1392847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696408 + 696409.

It is an arithmetic number, because the mean of its divisors is an integer number (696409).

2^1392817 is an apocalyptic number.

It is an amenable number.

1392817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1392817 is an equidigital number, since it uses as much as digits as its factorization.

1392817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 1392817 is about 1180.1766816880. The cubic root of 1392817 is about 111.6772436208.

It can be divided in two parts, 1392 and 817, that added together give a square (2209 = 47²).

The spelling of 1392817 in words is "one million, three hundred ninety-two thousand, eight hundred seventeen".