1221882592 has 48 divisors (see below), whose sum is σ = 2756164320. Its totient is φ = 522344448.

The previous prime is 1221882527. The next prime is 1221882593. The reversal of 1221882592 is 2952881221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221882593) 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, 84948 + ... + 98284.

It is an arithmetic number, because the mean of its divisors is an integer number (57420090).

Almost surely, 2^1221882592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221882592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378082160).

1221882592 is an abundant number, since it is smaller than the sum of its proper divisors (1534281728).

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

1221882592 is a wasteful number, since it uses less digits than its factorization.

1221882592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13763 (or 13755 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 1221882592 is about 34955.4372308515. The cubic root of 1221882592 is about 1069.0790666788.

The spelling of 1221882592 in words is "one billion, two hundred twenty-one million, eight hundred eighty-two thousand, five hundred ninety-two".