1321285460 has 48 divisors (see below), whose sum is σ = 3186267840. Its totient is φ = 455178240.

The previous prime is 1321285451. The next prime is 1321285487. The reversal of 1321285460 is 645821231.

It is a congruent number.

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, 153869 + ... + 162228.

It is an arithmetic number, because the mean of its divisors is an integer number (66380580).

Almost surely, 2^1321285460 is an apocalyptic number.

1321285460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321285460 is an abundant number, since it is smaller than the sum of its proper divisors (1864982380).

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

1321285460 is a wasteful number, since it uses less digits than its factorization.

1321285460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316136 (or 316134 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1321285460 is about 36349.4905053702. The cubic root of 1321285460 is about 1097.3172807894.

The spelling of 1321285460 in words is "one billion, three hundred twenty-one million, two hundred eighty-five thousand, four hundred sixty".