1391204 has 6 divisors (see below), whose sum is σ = 2434614. Its totient is φ = 695600.

The previous prime is 1391189. The next prime is 1391207. The reversal of 1391204 is 4021931.

It can be written as a sum of positive squares in only one way, i.e., 813604 + 577600 = 902^2 + 760^2 .

It is not an unprimeable number, because it can be changed into a prime (1391207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173897 + ... + 173904.

It is an arithmetic number, because the mean of its divisors is an integer number (405769).

2^1391204 is an apocalyptic number.

It is an amenable number.

1391204 is a deficient number, since it is larger than the sum of its proper divisors (1043410).

1391204 is a wasteful number, since it uses less digits than its factorization.

1391204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347805 (or 347803 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1391204 is about 1179.4931114678. The cubic root of 1391204 is about 111.6341164007.

The spelling of 1391204 in words is "one million, three hundred ninety-one thousand, two hundred four".