1220376775 has 6 divisors (see below), whose sum is σ = 1513267232. Its totient is φ = 976301400.

The previous prime is 1220376769. The next prime is 1220376791. The reversal of 1220376775 is 5776730221.

It is a happy number.

It is not a de Polignac number, because 1220376775 - 2¹⁵ = 1220344007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 24407511 + ... + 24407560.

Almost surely, 2^1220376775 is an apocalyptic number.

1220376775 is a deficient number, since it is larger than the sum of its proper divisors (292890457).

1220376775 is an equidigital number, since it uses as much as digits as its factorization.

1220376775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48815081 (or 48815076 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 1220376775 is about 34933.8914952228. The cubic root of 1220376775 is about 1068.6397175400.

The spelling of 1220376775 in words is "one billion, two hundred twenty million, three hundred seventy-six thousand, seven hundred seventy-five".