1217870404 has 9 divisors (see below), whose sum is σ = 2131395357. Its totient is φ = 608900304.

The previous prime is 1217870383. The next prime is 1217870431. The reversal of 1217870404 is 4040787121.

The square root of 1217870404 is 34898.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1210900804 + 6969600 = 34798^2 + 2640^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1217870404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 61072 + ... + 78520.

Almost surely, 2^1217870404 is an apocalyptic number.

1217870404 is the 34898-th square number.

It is an amenable number.

1217870404 is a deficient number, since it is larger than the sum of its proper divisors (913524953).

1217870404 is an frugal number, since it uses more digits than its factorization.

1217870404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34902 (or 17451 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The cubic root of 1217870404 is about 1067.9076367168.

Multiplying 1217870404 by its product of nonzero digits (12544), we get a square (15276966347776 = 3908576²).

The spelling of 1217870404 in words is "one billion, two hundred seventeen million, eight hundred seventy thousand, four hundred four".