1242593990089 has 9 divisors (see below), whose sum is σ = 1246998142701. Its totient is φ = 1238205349260.

The previous prime is 1242593990087. The next prime is 1242593990117. The reversal of 1242593990089 is 9800993952421.

The square root of 1242593990089 is 1114717.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1242593990089 - 2¹ = 1242593990087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242593990087) 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 8 ways as a sum of consecutive naturals, for example, 342216304 + ... + 342219934.

It is an arithmetic number, because the mean of its divisors is an integer number (138555349189).

Almost surely, 2^{1242593990089} is an apocalyptic number.

1242593990089 is the 1114717-th square number.

1242593990089 is the 557359-th centered octagonal number.

It is an amenable number.

1242593990089 is a deficient number, since it is larger than the sum of its proper divisors (4404152612).

1242593990089 is an frugal number, since it uses more digits than its factorization.

1242593990089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7876 (or 3938 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 1242593990089 in words is "one trillion, two hundred forty-two billion, five hundred ninety-three million, nine hundred ninety thousand, eighty-nine".