1222921584 has 40 divisors (see below), whose sum is σ = 3510239120. Its totient is φ = 407640384.

The previous prime is 1222921547. The next prime is 1222921589. The reversal of 1222921584 is 4851292221.

It is a super-2 number, since 2×1222921584² = 2991074401226138112, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222921589) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1414987 + ... + 1415850.

It is an arithmetic number, because the mean of its divisors is an integer number (87755978).

Almost surely, 2^1222921584 is an apocalyptic number.

It is an amenable number.

1222921584 is an abundant number, since it is smaller than the sum of its proper divisors (2287317536).

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

1222921584 is a wasteful number, since it uses less digits than its factorization.

1222921584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2830854 (or 2830842 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1222921584 is about 34970.2957379545. The cubic root of 1222921584 is about 1069.3820008336.

The spelling of 1222921584 in words is "one billion, two hundred twenty-two million, nine hundred twenty-one thousand, five hundred eighty-four".