1321740210 has 64 divisors (see below), whose sum is σ = 3699360000. Its totient is φ = 302109696.

The previous prime is 1321740197. The next prime is 1321740257. The reversal of 1321740210 is 120471231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53935 + ... + 74514.

It is an arithmetic number, because the mean of its divisors is an integer number (57802500).

Almost surely, 2^1321740210 is an apocalyptic number.

1321740210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321740210 is an abundant number, since it is smaller than the sum of its proper divisors (2377619790).

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

1321740210 is a wasteful number, since it uses less digits than its factorization.

1321740210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128480 (or 128466 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1321740210 is about 36355.7452131022. The cubic root of 1321740210 is about 1097.4431551271.

The spelling of 1321740210 in words is "one billion, three hundred twenty-one million, seven hundred forty thousand, two hundred ten".