1220900875 has 16 divisors (see below), whose sum is σ = 1527061536. Its totient is φ = 974556000.

The previous prime is 1220900861. The next prime is 1220900903. The reversal of 1220900875 is 5780090221.

It is not a de Polignac number, because 1220900875 - 2⁹ = 1220900363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220900875.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47032 + ... + 68218.

It is an arithmetic number, because the mean of its divisors is an integer number (95441346).

Almost surely, 2^1220900875 is an apocalyptic number.

1220900875 is a deficient number, since it is larger than the sum of its proper divisors (306160661).

1220900875 is an equidigital number, since it uses as much as digits as its factorization.

1220900875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21663 (or 21653 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1220900875 is about 34941.3920014644. The cubic root of 1220900875 is about 1068.7926741051.

The spelling of 1220900875 in words is "one billion, two hundred twenty million, nine hundred thousand, eight hundred seventy-five".