1392724 has 6 divisors (see below), whose sum is σ = 2437274. Its totient is φ = 696360.

The previous prime is 1392707. The next prime is 1392731. The reversal of 1392724 is 4272931.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 324 = 1180^2 + 18^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1392692 and 1392701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174087 + ... + 174094.

2^1392724 is an apocalyptic number.

It is an amenable number.

1392724 is a deficient number, since it is larger than the sum of its proper divisors (1044550).

1392724 is a wasteful number, since it uses less digits than its factorization.

1392724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348185 (or 348183 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 1392724 is about 1180.1372801501. The cubic root of 1392724 is about 111.6747579593.

It can be divided in two parts, 1392 and 724, that added together give a square (2116 = 46²).

The spelling of 1392724 in words is "one million, three hundred ninety-two thousand, seven hundred twenty-four".