1220505875 has 16 divisors (see below), whose sum is σ = 1525226976. Its totient is φ = 975100000.

The previous prime is 1220505863. The next prime is 1220505883. The reversal of 1220505875 is 5785050221.

It is not a de Polignac number, because 1220505875 - 2¹⁶ = 1220440339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93500 + ... + 105750.

It is an arithmetic number, because the mean of its divisors is an integer number (95326686).

Almost surely, 2^1220505875 is an apocalyptic number.

1220505875 is a deficient number, since it is larger than the sum of its proper divisors (304721101).

1220505875 is an equidigital number, since it uses as much as digits as its factorization.

1220505875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13063 (or 13053 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 1220505875 is about 34935.7392221776. The cubic root of 1220505875 is about 1068.6773989418.

The spelling of 1220505875 in words is "one billion, two hundred twenty million, five hundred five thousand, eight hundred seventy-five".