1217192955 has 32 divisors (see below), whose sum is σ = 2126476800. Its totient is φ = 589620480.

The previous prime is 1217192941. The next prime is 1217192969. The reversal of 1217192955 is 5592917121.

It is an interprime number because it is at equal distance from previous prime (1217192941) and next prime (1217192969).

It is not a de Polignac number, because 1217192955 - 2⁶ = 1217192891 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 228199 + ... + 233471.

It is an arithmetic number, because the mean of its divisors is an integer number (66452400).

Almost surely, 2^1217192955 is an apocalyptic number.

1217192955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1217192955 is a deficient number, since it is larger than the sum of its proper divisors (909283845).

1217192955 is a wasteful number, since it uses less digits than its factorization.

1217192955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6691.

The product of its digits is 56700, while the sum is 42.

The square root of 1217192955 is about 34888.2925205577. The cubic root of 1217192955 is about 1067.7095896062.

The spelling of 1217192955 in words is "one billion, two hundred seventeen million, one hundred ninety-two thousand, nine hundred fifty-five".