1220672159 has 16 divisors (see below), whose sum is σ = 1422051840. Its totient is φ = 1026142560.

The previous prime is 1220672099. The next prime is 1220672161. The reversal of 1220672159 is 9512760221.

It is a cyclic number.

It is not a de Polignac number, because 1220672159 - 2¹² = 1220668063 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 (1220672179) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 149312 + ... + 157274.

It is an arithmetic number, because the mean of its divisors is an integer number (88878240).

Almost surely, 2^1220672159 is an apocalyptic number.

1220672159 is a deficient number, since it is larger than the sum of its proper divisors (201379681).

1220672159 is an equidigital number, since it uses as much as digits as its factorization.

1220672159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8390.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1220672159 is about 34938.1189963055. The cubic root of 1220672159 is about 1068.7259296062.

The spelling of 1220672159 in words is "one billion, two hundred twenty million, six hundred seventy-two thousand, one hundred fifty-nine".