1392745 has 4 divisors (see below), whose sum is σ = 1671300. Its totient is φ = 1114192.

The previous prime is 1392733. The next prime is 1392763. The reversal of 1392745 is 5472931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5472931 = 19 ⋅288049.

It can be written as a sum of positive squares in 2 ways, for example, as 561001 + 831744 = 749^2 + 912^2 .

It is a cyclic number.

It is not a de Polignac number, because 1392745 - 2⁹ = 1392233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139270 + ... + 139279.

It is an arithmetic number, because the mean of its divisors is an integer number (417825).

2^1392745 is an apocalyptic number.

It is an amenable number.

1392745 is a deficient number, since it is larger than the sum of its proper divisors (278555).

1392745 is an equidigital number, since it uses as much as digits as its factorization.

1392745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278554.

The product of its digits is 7560, while the sum is 31.

The square root of 1392745 is about 1180.1461773865. The cubic root of 1392745 is about 111.6753192474.

The spelling of 1392745 in words is "one million, three hundred ninety-two thousand, seven hundred forty-five".