1272496783 has 4 divisors (see below), whose sum is σ = 1293357448. Its totient is φ = 1251636120.

The previous prime is 1272496777. The next prime is 1272496811. The reversal of 1272496783 is 3876942721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1272496783 - 2⁹ = 1272496271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272496703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10430241 + ... + 10430362.

It is an arithmetic number, because the mean of its divisors is an integer number (323339362).

Almost surely, 2^1272496783 is an apocalyptic number.

1272496783 is a deficient number, since it is larger than the sum of its proper divisors (20860665).

1272496783 is an equidigital number, since it uses as much as digits as its factorization.

1272496783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20860664.

The product of its digits is 1016064, while the sum is 49.

The square root of 1272496783 is about 35672.0728722063. The cubic root of 1272496783 is about 1083.6413392828.

The spelling of 1272496783 in words is "one billion, two hundred seventy-two million, four hundred ninety-six thousand, seven hundred eighty-three".