1392004 has 6 divisors (see below), whose sum is σ = 2436014. Its totient is φ = 696000.

The previous prime is 1391989. The next prime is 1392007. The reversal of 1392004 is 4002931.

It can be written as a sum of positive squares in only one way, i.e., 1368900 + 23104 = 1170^2 + 152^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1392007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173997 + ... + 174004.

2^1392004 is an apocalyptic number.

It is an amenable number.

1392004 is a deficient number, since it is larger than the sum of its proper divisors (1044010).

1392004 is a wasteful number, since it uses less digits than its factorization.

1392004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348005 (or 348003 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1392004 is about 1179.8321914578. The cubic root of 1392004 is about 111.6555103827.

Adding to 1392004 its reverse (4002931), we get a palindrome (5394935).

The spelling of 1392004 in words is "one million, three hundred ninety-two thousand, four".