1242205124245 has 16 divisors (see below), whose sum is σ = 1492445809152. Its totient is φ = 992564876160.

The previous prime is 1242205124239. The next prime is 1242205124351. The reversal of 1242205124245 is 5424215022421.

It is not a de Polignac number, because 1242205124245 - 2²⁵ = 1242171569813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242205124245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19331089 + ... + 19395241.

It is an arithmetic number, because the mean of its divisors is an integer number (93277863072).

Almost surely, 2^{1242205124245} is an apocalyptic number.

It is an amenable number.

1242205124245 is a deficient number, since it is larger than the sum of its proper divisors (250240684907).

1242205124245 is a wasteful number, since it uses less digits than its factorization.

1242205124245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68772.

The product of its (nonzero) digits is 51200, while the sum is 34.

The spelling of 1242205124245 in words is "one trillion, two hundred forty-two billion, two hundred five million, one hundred twenty-four thousand, two hundred forty-five".