1242042020402 has 16 divisors (see below), whose sum is σ = 1985428876032. Its totient is φ = 581381370240.

The previous prime is 1242042020371. The next prime is 1242042020411. The reversal of 1242042020402 is 2040202402421.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 287241599 + ... + 287245922.

It is an arithmetic number, because the mean of its divisors is an integer number (124089304752).

Almost surely, 2^{1242042020402} is an apocalyptic number.

1242042020402 is a deficient number, since it is larger than the sum of its proper divisors (743386855630).

1242042020402 is a wasteful number, since it uses less digits than its factorization.

1242042020402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574487593.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 1242042020402 its reverse (2040202402421), we get a palindrome (3282244422823).

The spelling of 1242042020402 in words is "one trillion, two hundred forty-two billion, forty-two million, twenty thousand, four hundred two".