1272215323 has 4 divisors (see below), whose sum is σ = 1272323200. Its totient is φ = 1272107448.

The previous prime is 1272215299. The next prime is 1272215333. The reversal of 1272215323 is 3235122721.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272215323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1272215291 and 1272215300.

It is not an unprimeable number, because it can be changed into a prime (1272215333) 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, 33723 + ... + 60676.

It is an arithmetic number, because the mean of its divisors is an integer number (318080800).

Almost surely, 2^1272215323 is an apocalyptic number.

1272215323 is a deficient number, since it is larger than the sum of its proper divisors (107877).

1272215323 is an equidigital number, since it uses as much as digits as its factorization.

1272215323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107876.

The product of its digits is 5040, while the sum is 28.

The square root of 1272215323 is about 35668.1275510784. The cubic root of 1272215323 is about 1083.5614375270.

The spelling of 1272215323 in words is "one billion, two hundred seventy-two million, two hundred fifteen thousand, three hundred twenty-three".