1272042533 has 4 divisors (see below), whose sum is σ = 1338992160. Its totient is φ = 1205092908.

The previous prime is 1272042517. The next prime is 1272042547. The reversal of 1272042533 is 3352402721.

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: 3352402721 = 27701 ⋅121021.

It is a cyclic number.

It is not a de Polignac number, because 1272042533 - 2⁴ = 1272042517 is a prime.

It is a super-2 number, since 2×1272042533² = 3236184411522112178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1272042496 and 1272042505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272042553) 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, 33474785 + ... + 33474822.

It is an arithmetic number, because the mean of its divisors is an integer number (334748040).

Almost surely, 2^1272042533 is an apocalyptic number.

It is an amenable number.

1272042533 is a deficient number, since it is larger than the sum of its proper divisors (66949627).

1272042533 is an equidigital number, since it uses as much as digits as its factorization.

1272042533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66949626.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 1272042533 is about 35665.7052783202. The cubic root of 1272042533 is about 1083.5123795166.

The spelling of 1272042533 in words is "one billion, two hundred seventy-two million, forty-two thousand, five hundred thirty-three".