1245096673921 has 3 divisors (see below), whose sum is σ = 1245097789761. Its totient is φ = 1245095558082.

The previous prime is 1245096673903. The next prime is 1245096673927. The reversal of 1245096673921 is 1293766905421.

The square root of 1245096673921 is 1115839.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1245096673921 - 2⁹ = 1245096673409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1245096673927) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 557920 + ... + 1673758.

It is an arithmetic number, because the mean of its divisors is an integer number (415032596587).

Almost surely, 2^{1245096673921} is an apocalyptic number.

1245096673921 is the 1115839-th square number.

1245096673921 is the 557920-th centered octagonal number.

It is an amenable number.

1245096673921 is a deficient number, since it is larger than the sum of its proper divisors (1115840).

1245096673921 is an frugal number, since it uses more digits than its factorization.

1245096673921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231678 (or 1115839 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 1245096673921 in words is "one trillion, two hundred forty-five billion, ninety-six million, six hundred seventy-three thousand, nine hundred twenty-one".