1173218642 has 16 divisors (see below), whose sum is σ = 1791283200. Its totient is φ = 576175248.

The previous prime is 1173218639. The next prime is 1173218647. The reversal of 1173218642 is 2468123711.

It is not an unprimeable number, because it can be changed into a prime (1173218647) 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 7 ways as a sum of consecutive naturals, for example, 34223 + ... + 59309.

It is an arithmetic number, because the mean of its divisors is an integer number (111955200).

Almost surely, 2^1173218642 is an apocalyptic number.

1173218642 is a deficient number, since it is larger than the sum of its proper divisors (618064558).

1173218642 is a wasteful number, since it uses less digits than its factorization.

1173218642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25505.

The product of its digits is 16128, while the sum is 35.

The square root of 1173218642 is about 34252.2793694084. The cubic root of 1173218642 is about 1054.6936187213.

The spelling of 1173218642 in words is "one billion, one hundred seventy-three million, two hundred eighteen thousand, six hundred forty-two".