1215264 has 24 divisors (see below), whose sum is σ = 3190320. Its totient is φ = 405056.

The previous prime is 1215239. The next prime is 1215271. The reversal of 1215264 is 4625121.

1215264 = T₁₆₂ + T₁₆₃ + ... + T₂₂₅.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1215264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6234 + ... + 6425.

It is an arithmetic number, because the mean of its divisors is an integer number (132930).

2^1215264 is an apocalyptic number.

It is an amenable number.

1215264 is an abundant number, since it is smaller than the sum of its proper divisors (1975056).

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

1215264 is a wasteful number, since it uses less digits than its factorization.

1215264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12672 (or 12664 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 1215264 is about 1102.3901305799. The cubic root of 1215264 is about 106.7145271333.

The spelling of 1215264 in words is "one million, two hundred fifteen thousand, two hundred sixty-four".