1217059842 has 8 divisors (see below), whose sum is σ = 2434119696. Its totient is φ = 405686612.

The previous prime is 1217059841. The next prime is 1217059871. The reversal of 1217059842 is 2489507121.

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

1217059842 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1217059842.

It is not an unprimeable number, because it can be changed into a prime (1217059841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101421648 + ... + 101421659.

It is an arithmetic number, because the mean of its divisors is an integer number (304264962).

Almost surely, 2^1217059842 is an apocalyptic number.

1217059842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217059842 is a wasteful number, since it uses less digits than its factorization.

1217059842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202843312.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 1217059842 is about 34886.3847654067. The cubic root of 1217059842 is about 1067.6706663861.

The spelling of 1217059842 in words is "one billion, two hundred seventeen million, fifty-nine thousand, eight hundred forty-two".