1020720604 has 6 divisors (see below), whose sum is σ = 1786261064. Its totient is φ = 510360300.

The previous prime is 1020720599. The next prime is 1020720607. The reversal of 1020720604 is 4060270201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020720607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127590072 + ... + 127590079.

Almost surely, 2^1020720604 is an apocalyptic number.

It is an amenable number.

1020720604 is a deficient number, since it is larger than the sum of its proper divisors (765540460).

1020720604 is a wasteful number, since it uses less digits than its factorization.

1020720604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255180155 (or 255180153 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1020720604 is about 31948.7183467506. The cubic root of 1020720604 is about 1006.8597048536.

Adding to 1020720604 its reverse (4060270201), we get a palindrome (5080990805).

The spelling of 1020720604 in words is "one billion, twenty million, seven hundred twenty thousand, six hundred four".