1211596864 has 63 divisors (see below), whose sum is σ = 2548591677. Its totient is φ = 571408128.

The previous prime is 1211596843. The next prime is 1211596889. The reversal of 1211596864 is 4686951121.

The square root of 1211596864 is 34808.

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., 1128422464 + 83174400 = 33592^2 + 9120^2 .

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 1211596864.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5290702 + ... + 5290930.

Almost surely, 2^1211596864 is an apocalyptic number.

1211596864 is the 34808-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211596864

1211596864 is an abundant number, since it is smaller than the sum of its proper divisors (1336994813).

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

1211596864 is an frugal number, since it uses more digits than its factorization.

1211596864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 250 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The cubic root of 1211596864 is about 1066.0707970538.

The spelling of 1211596864 in words is "one billion, two hundred eleven million, five hundred ninety-six thousand, eight hundred sixty-four".