1242205124305 has 8 divisors (see below), whose sum is σ = 1578331216872. Its totient is φ = 935307387648.

The previous prime is 1242205124239. The next prime is 1242205124351. The reversal of 1242205124305 is 5034215022421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 97341504016 + 1144863620289 = 311996^2 + 1069983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1242205124305 - 2³⁵ = 1207845385937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7307088882 + ... + 7307089051.

It is an arithmetic number, because the mean of its divisors is an integer number (197291402109).

Almost surely, 2^{1242205124305} is an apocalyptic number.

It is an amenable number.

1242205124305 is a deficient number, since it is larger than the sum of its proper divisors (336126092567).

1242205124305 is a wasteful number, since it uses less digits than its factorization.

1242205124305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14614177955.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 1242205124305 in words is "one trillion, two hundred forty-two billion, two hundred five million, one hundred twenty-four thousand, three hundred five".