1321294435560 has 96 divisors (see below), whose sum is σ = 4684589376480. Its totient is φ = 320313801600.

The previous prime is 1321294435471. The next prime is 1321294435567. The reversal of 1321294435560 is 655344921231.

1321294435560 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 2 + 94 + 4 + 3 + 556 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1321294435567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166826146 + ... + 166834065.

It is an arithmetic number, because the mean of its divisors is an integer number (48797806005).

Almost surely, 2^{1321294435560} is an apocalyptic number.

1321294435560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321294435560 is an abundant number, since it is smaller than the sum of its proper divisors (3363294940920).

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

1321294435560 is a wasteful number, since it uses less digits than its factorization.

1321294435560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333660239 (or 333660232 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 1321294435560 in words is "one trillion, three hundred twenty-one billion, two hundred ninety-four million, four hundred thirty-five thousand, five hundred sixty".