1321694112 has 96 divisors (see below), whose sum is σ = 3674764800. Its totient is φ = 414782208.

The previous prime is 1321694089. The next prime is 1321694113. The reversal of 1321694112 is 2114961231.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 1321694112.

It is not an unprimeable number, because it can be changed into a prime (1321694113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302439 + ... + 306777.

It is an arithmetic number, because the mean of its divisors is an integer number (38278800).

Almost surely, 2^1321694112 is an apocalyptic number.

1321694112 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 1321694112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837382400).

1321694112 is an abundant number, since it is smaller than the sum of its proper divisors (2353070688).

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

1321694112 is a wasteful number, since it uses less digits than its factorization.

1321694112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538 (or 4530 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 1321694112 is about 36355.1112224952. Note that the first 3 decimals coincide. The cubic root of 1321694112 is about 1097.4303965627.

The spelling of 1321694112 in words is "one billion, three hundred twenty-one million, six hundred ninety-four thousand, one hundred twelve".