1173242261543 has 16 divisors (see below), whose sum is σ = 1367854262784. Its totient is φ = 994461912960.

The previous prime is 1173242261539. The next prime is 1173242261549. The reversal of 1173242261543 is 3451622423711.

It is a cyclic number.

It is not a de Polignac number, because 1173242261543 - 2² = 1173242261539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1173242261543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173242261549) 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, 29297855 + ... + 29337872.

It is an arithmetic number, because the mean of its divisors is an integer number (85490891424).

Almost surely, 2^{1173242261543} is an apocalyptic number.

1173242261543 is a deficient number, since it is larger than the sum of its proper divisors (194612001241).

1173242261543 is a wasteful number, since it uses less digits than its factorization.

1173242261543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58635862.

The product of its digits is 241920, while the sum is 41.

The spelling of 1173242261543 in words is "one trillion, one hundred seventy-three billion, two hundred forty-two million, two hundred sixty-one thousand, five hundred forty-three".