1172342643 has 16 divisors (see below), whose sum is σ = 1602577536. Its totient is φ = 761866560.

The previous prime is 1172342641. The next prime is 1172342651. The reversal of 1172342643 is 3462432711.

It is not a de Polignac number, because 1172342643 - 2¹ = 1172342641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1172342641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179196 + ... + 185622.

It is an arithmetic number, because the mean of its divisors is an integer number (100161096).

Almost surely, 2^1172342643 is an apocalyptic number.

1172342643 is a deficient number, since it is larger than the sum of its proper divisors (430234893).

1172342643 is a wasteful number, since it uses less digits than its factorization.

1172342643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954.

The product of its digits is 24192, while the sum is 33.

The square root of 1172342643 is about 34239.4895259845. The cubic root of 1172342643 is about 1054.4310531126.

The spelling of 1172342643 in words is "one billion, one hundred seventy-two million, three hundred forty-two thousand, six hundred forty-three".