1273745913 has 8 divisors (see below), whose sum is σ = 1852721376. Its totient is φ = 771967200.

The previous prime is 1273745813. The next prime is 1273745923. The reversal of 1273745913 is 3195473721.

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

It is not a de Polignac number, because 1273745913 - 2¹⁴ = 1273729529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1273745923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19299148 + ... + 19299213.

It is an arithmetic number, because the mean of its divisors is an integer number (231590172).

Almost surely, 2^1273745913 is an apocalyptic number.

It is an amenable number.

1273745913 is a deficient number, since it is larger than the sum of its proper divisors (578975463).

1273745913 is a wasteful number, since it uses less digits than its factorization.

1273745913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38598375.

The product of its digits is 158760, while the sum is 42.

The square root of 1273745913 is about 35689.5770919186. The cubic root of 1273745913 is about 1083.9958041554.

The spelling of 1273745913 in words is "one billion, two hundred seventy-three million, seven hundred forty-five thousand, nine hundred thirteen".