1215205464 has 32 divisors (see below), whose sum is σ = 3314197440. Its totient is φ = 368244000.

The previous prime is 1215205367. The next prime is 1215205489. The reversal of 1215205464 is 4645025121.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301262 + ... + 2301789.

It is an arithmetic number, because the mean of its divisors is an integer number (103568670).

Almost surely, 2^1215205464 is an apocalyptic number.

It is an amenable number.

1215205464 is an abundant number, since it is smaller than the sum of its proper divisors (2098991976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215205464 is a wasteful number, since it uses less digits than its factorization.

1215205464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603071 (or 4603067 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 1215205464 is about 34859.7972455377. The cubic root of 1215205464 is about 1067.1281372182.

The spelling of 1215205464 in words is "one billion, two hundred fifteen million, two hundred five thousand, four hundred sixty-four".