1321890910 has 8 divisors (see below), whose sum is σ = 2379403656. Its totient is φ = 528756360.

The previous prime is 1321890887. The next prime is 1321890919. The reversal of 1321890910 is 190981231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321890919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66094536 + ... + 66094555.

It is an arithmetic number, because the mean of its divisors is an integer number (297425457).

Almost surely, 2^1321890910 is an apocalyptic number.

1321890910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321890910 is a deficient number, since it is larger than the sum of its proper divisors (1057512746).

1321890910 is a wasteful number, since it uses less digits than its factorization.

1321890910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132189098.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1321890910 is about 36357.8177287911. The cubic root of 1321890910 is about 1097.4848623646.

The spelling of 1321890910 in words is "one billion, three hundred twenty-one million, eight hundred ninety thousand, nine hundred ten".