1242692947399 has 4 divisors (see below), whose sum is σ = 1260195665040. Its totient is φ = 1225190229760.

The previous prime is 1242692947357. The next prime is 1242692947409. The reversal of 1242692947399 is 9937492962421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242692947399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242692947099) 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 3 ways as a sum of consecutive naturals, for example, 8751358714 + ... + 8751358855.

It is an arithmetic number, because the mean of its divisors is an integer number (315048916260).

Almost surely, 2^{1242692947399} is an apocalyptic number.

1242692947399 is a deficient number, since it is larger than the sum of its proper divisors (17502717641).

1242692947399 is an equidigital number, since it uses as much as digits as its factorization.

1242692947399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17502717640.

The product of its digits is 105815808, while the sum is 67.

The spelling of 1242692947399 in words is "one trillion, two hundred forty-two billion, six hundred ninety-two million, nine hundred forty-seven thousand, three hundred ninety-nine".