1220009975 has 24 divisors (see below), whose sum is σ = 1552161072. Its totient is φ = 950745600.

The previous prime is 1220009951. The next prime is 1220009977. The reversal of 1220009975 is 5799000221.

It is not a de Polignac number, because 1220009975 - 2¹² = 1220005879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220009977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 464165 + ... + 466785.

It is an arithmetic number, because the mean of its divisors is an integer number (64673378).

Almost surely, 2^1220009975 is an apocalyptic number.

1220009975 is a deficient number, since it is larger than the sum of its proper divisors (332151097).

1220009975 is a wasteful number, since it uses less digits than its factorization.

1220009975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107 (or 3102 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 1220009975 is about 34928.6411845637. The cubic root of 1220009975 is about 1068.5326423224.

The spelling of 1220009975 in words is "one billion, two hundred twenty million, nine thousand, nine hundred seventy-five".