1219745745242 has 8 divisors (see below), whose sum is σ = 1846404110100. Its totient is φ = 604277708544.

The previous prime is 1219745745227. The next prime is 1219745745347. The reversal of 1219745745242 is 2425475479121.

It is a happy number.

It is a Cunningham number, because it is equal to 1104421²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 1219745745241 + 1 = 1104421^2 + 1^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2797581767 + ... + 2797582202.

Almost surely, 2^{1219745745242} is an apocalyptic number.

1219745745242 is a deficient number, since it is larger than the sum of its proper divisors (626658364858).

1219745745242 is a wasteful number, since it uses less digits than its factorization.

1219745745242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5595164080.

The product of its digits is 5644800, while the sum is 53.

The spelling of 1219745745242 in words is "one trillion, two hundred nineteen billion, seven hundred forty-five million, seven hundred forty-five thousand, two hundred forty-two".