1220751172 has 24 divisors (see below), whose sum is σ = 2221128000. Its totient is φ = 586355616.

The previous prime is 1220751167. The next prime is 1220751193. The reversal of 1220751172 is 2711570221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220751172.

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 7 ways as a sum of consecutive naturals, for example, 3358 + ... + 49525.

It is an arithmetic number, because the mean of its divisors is an integer number (92547000).

Almost surely, 2^1220751172 is an apocalyptic number.

It is an amenable number.

1220751172 is a deficient number, since it is larger than the sum of its proper divisors (1000376828).

1220751172 is a wasteful number, since it uses less digits than its factorization.

1220751172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53115 (or 53113 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The square root of 1220751172 is about 34939.2497343604. The cubic root of 1220751172 is about 1068.7489883282.

The spelling of 1220751172 in words is "one billion, two hundred twenty million, seven hundred fifty-one thousand, one hundred seventy-two".