1219745745241 has 9 divisors (see below), whose sum is σ = 1240836090421. Its totient is φ = 1199008032124.

The previous prime is 1219745745227. The next prime is 1219745745347. The reversal of 1219745745241 is 1425475479121.

The square root of 1219745745241 is 1104421.

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

It is not a de Polignac number, because 1219745745241 - 2¹¹ = 1219745743193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219745745641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 65151480 + ... + 65170198.

Almost surely, 2^{1219745745241} is an apocalyptic number.

1219745745241 is the 1104421-st square number.

1219745745241 is the 552211-st centered octagonal number.

It is an amenable number.

1219745745241 is a deficient number, since it is larger than the sum of its proper divisors (21090345180).

1219745745241 is an frugal number, since it uses more digits than its factorization.

1219745745241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37556 (or 18778 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 52.

The spelling of 1219745745241 in words is "one trillion, two hundred nineteen billion, seven hundred forty-five million, seven hundred forty-five thousand, two hundred forty-one".