1242568977923 has 16 divisors (see below), whose sum is σ = 1619275412160. Its totient is φ = 925300233216.

The previous prime is 1242568977901. The next prime is 1242568977953. The reversal of 1242568977923 is 3297798652421.

It is a cyclic number.

It is not a de Polignac number, because 1242568977923 - 2²⁰ = 1242567929347 is a prime.

It is a super-2 number, since 2×1242568977923² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1242568977923.

It is not an unprimeable number, because it can be changed into a prime (1242568977953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401604458 + ... + 401607551.

It is an arithmetic number, because the mean of its divisors is an integer number (101204713260).

Almost surely, 2^{1242568977923} is an apocalyptic number.

1242568977923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1242568977923 is a deficient number, since it is larger than the sum of its proper divisors (376706434237).

1242568977923 is a wasteful number, since it uses less digits than its factorization.

1242568977923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803212046.

The product of its digits is 91445760, while the sum is 65.

The spelling of 1242568977923 in words is "one trillion, two hundred forty-two billion, five hundred sixty-eight million, nine hundred seventy-seven thousand, nine hundred twenty-three".