1321250056 has 32 divisors (see below), whose sum is σ = 2836491840. Its totient is φ = 565201728.

The previous prime is 1321250027. The next prime is 1321250093. The reversal of 1321250056 is 6500521231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321250056.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9066 + ... + 52198.

It is an arithmetic number, because the mean of its divisors is an integer number (88640370).

Almost surely, 2^1321250056 is an apocalyptic number.

It is an amenable number.

1321250056 is an abundant number, since it is smaller than the sum of its proper divisors (1515241784).

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

1321250056 is a wasteful number, since it uses less digits than its factorization.

1321250056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43693 (or 43689 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1321250056 is about 36349.0035076617. The cubic root of 1321250056 is about 1097.3074797865.

Adding to 1321250056 its reverse (6500521231), we get a palindrome (7821771287).

The spelling of 1321250056 in words is "one billion, three hundred twenty-one million, two hundred fifty thousand, fifty-six".