1220574761 has 12 divisors (see below), whose sum is σ = 1424011392. Its totient is φ = 1046192532.

The previous prime is 1220574757. The next prime is 1220574769. The reversal of 1220574761 is 1674750221.

It is not a de Polignac number, because 1220574761 - 2² = 1220574757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220574769) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 19505 + ... + 53118.

It is an arithmetic number, because the mean of its divisors is an integer number (118667616).

Almost surely, 2^1220574761 is an apocalyptic number.

It is an amenable number.

1220574761 is a deficient number, since it is larger than the sum of its proper divisors (203436631).

1220574761 is an frugal number, since it uses more digits than its factorization.

1220574761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72658 (or 72630 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 1220574761 is about 34936.7251041079. The cubic root of 1220574761 is about 1068.6975041370.

The spelling of 1220574761 in words is "one billion, two hundred twenty million, five hundred seventy-four thousand, seven hundred sixty-one".