1272380033 has 4 divisors (see below), whose sum is σ = 1327700928. Its totient is φ = 1217059140.

The previous prime is 1272379961. The next prime is 1272380041. The reversal of 1272380033 is 3300832721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3300832721 = 109 ⋅30282869.

It is a cyclic number.

It is not a de Polignac number, because 1272380033 - 2¹⁶ = 1272314497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1272379978 and 1272380005.

It is not an unprimeable number, because it can be changed into a prime (1272380093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27660413 + ... + 27660458.

It is an arithmetic number, because the mean of its divisors is an integer number (331925232).

Almost surely, 2^1272380033 is an apocalyptic number.

It is an amenable number.

1272380033 is a deficient number, since it is larger than the sum of its proper divisors (55320895).

1272380033 is an equidigital number, since it uses as much as digits as its factorization.

1272380033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55320894.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1272380033 is about 35670.4364004703. The cubic root of 1272380033 is about 1083.6081973534.

The spelling of 1272380033 in words is "one billion, two hundred seventy-two million, three hundred eighty thousand, thirty-three".