1217012955 has 8 divisors (see below), whose sum is σ = 1947220752. Its totient is φ = 649073568.

The previous prime is 1217012941. The next prime is 1217012959. The reversal of 1217012955 is 5592107121.

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

It is not a de Polignac number, because 1217012955 - 2⁴ = 1217012939 is a prime.

It is a super-2 number, since 2×1217012955² = 2962241065275664050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1217012959) 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, 40567084 + ... + 40567113.

It is an arithmetic number, because the mean of its divisors is an integer number (243402594).

Almost surely, 2^1217012955 is an apocalyptic number.

1217012955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1217012955 is a deficient number, since it is larger than the sum of its proper divisors (730207797).

1217012955 is an equidigital number, since it uses as much as digits as its factorization.

1217012955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81134205.

The product of its (nonzero) digits is 6300, while the sum is 33.

The square root of 1217012955 is about 34885.7127632502. The cubic root of 1217012955 is about 1067.6569556066.

The spelling of 1217012955 in words is "one billion, two hundred seventeen million, twelve thousand, nine hundred fifty-five".