1212928955 has 16 divisors (see below), whose sum is σ = 1664803584. Its totient is φ = 831043680.

The previous prime is 1212928933. The next prime is 1212928963. The reversal of 1212928955 is 5598292121.

It is not a de Polignac number, because 1212928955 - 2³⁰ = 139187131 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 31400 + ... + 58410.

It is an arithmetic number, because the mean of its divisors is an integer number (104050224).

Almost surely, 2^1212928955 is an apocalyptic number.

1212928955 is a deficient number, since it is larger than the sum of its proper divisors (451874629).

1212928955 is a wasteful number, since it uses less digits than its factorization.

1212928955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28306.

The product of its digits is 129600, while the sum is 44.

The square root of 1212928955 is about 34827.1295831282. The cubic root of 1212928955 is about 1066.4613513791.

The spelling of 1212928955 in words is "one billion, two hundred twelve million, nine hundred twenty-eight thousand, nine hundred fifty-five".