1221284352 has 80 divisors (see below), whose sum is σ = 3445038432. Its totient is φ = 383139840.

The previous prime is 1221284333. The next prime is 1221284357. The reversal of 1221284352 is 2534821221.

It is not an unprimeable number, because it can be changed into a prime (1221284357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2727 + ... + 49497.

Almost surely, 2^1221284352 is an apocalyptic number.

1221284352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221284352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722519216).

1221284352 is an abundant number, since it is smaller than the sum of its proper divisors (2223754080).

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

1221284352 is an equidigital number, since it uses as much as digits as its factorization.

1221284352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46809 (or 46793 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 1221284352 is about 34946.8790022800. The cubic root of 1221284352 is about 1068.9045626603.

The spelling of 1221284352 in words is "one billion, two hundred twenty-one million, two hundred eighty-four thousand, three hundred fifty-two".