1321001232 has 80 divisors (see below), whose sum is σ = 3518620032. Its totient is φ = 426746880.

The previous prime is 1321001219. The next prime is 1321001281. The reversal of 1321001232 is 2321001231.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497733 + ... + 500379.

Almost surely, 2^1321001232 is an apocalyptic number.

1321001232 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 1321001232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1759310016).

1321001232 is an abundant number, since it is smaller than the sum of its proper divisors (2197618800).

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

1321001232 is a wasteful number, since it uses less digits than its factorization.

1321001232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1321001232 is about 36345.5806391919. The cubic root of 1321001232 is about 1097.2385921003.

Adding to 1321001232 its reverse (2321001231), we get a palindrome (3642002463).

Subtracting 1321001232 from its reverse (2321001231), we obtain a palindrome (999999999).

The spelling of 1321001232 in words is "one billion, three hundred twenty-one million, one thousand, two hundred thirty-two".