1220764361 has 8 divisors (see below), whose sum is σ = 1224840960. Its totient is φ = 1216695168.

The previous prime is 1220764351. The next prime is 1220764379. The reversal of 1220764361 is 1634670221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220764361 - 2³⁰ = 147022537 is a prime.

It is a super-3 number, since 3×1220764361³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220764351) 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 7 ways as a sum of consecutive naturals, for example, 645305 + ... + 647193.

It is an arithmetic number, because the mean of its divisors is an integer number (153105120).

Almost surely, 2^1220764361 is an apocalyptic number.

It is an amenable number.

1220764361 is a deficient number, since it is larger than the sum of its proper divisors (4076599).

1220764361 is a wasteful number, since it uses less digits than its factorization.

1220764361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1220764361 is about 34939.4384757397. The cubic root of 1220764361 is about 1068.7528372370.

The spelling of 1220764361 in words is "one billion, two hundred twenty million, seven hundred sixty-four thousand, three hundred sixty-one".