1020904 has 16 divisors (see below), whose sum is σ = 1966500. Its totient is φ = 496512.

The previous prime is 1020893. The next prime is 1020907. The reversal of 1020904 is 4090201.

It can be written as a sum of positive squares in 2 ways, for example, as 1004004 + 16900 = 1002^2 + 130^2 .

It is not an unprimeable number, because it can be changed into a prime (1020907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429 + ... + 2020.

2^1020904 is an apocalyptic number.

It is an amenable number.

1020904 is a deficient number, since it is larger than the sum of its proper divisors (945596).

1020904 is a wasteful number, since it uses less digits than its factorization.

1020904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492 (or 3488 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1020904 is about 1010.3979414072. The cubic root of 1020904 is about 100.6920003099.

The spelling of 1020904 in words is "one million, twenty thousand, nine hundred four".