1242494254579 has 2 divisors, whose sum is σ = 1242494254580. Its totient is φ = 1242494254578.

The previous prime is 1242494254553. The next prime is 1242494254633. The reversal of 1242494254579 is 9754524942421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242494254579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242494254549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621247127289 + 621247127290.

It is an arithmetic number, because the mean of its divisors is an integer number (621247127290).

Almost surely, 2^{1242494254579} is an apocalyptic number.

1242494254579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242494254579 is an equidigital number, since it uses as much as digits as its factorization.

1242494254579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 58.

The spelling of 1242494254579 in words is "one trillion, two hundred forty-two billion, four hundred ninety-four million, two hundred fifty-four thousand, five hundred seventy-nine".