1272057213 has 8 divisors (see below), whose sum is σ = 1938372928. Its totient is φ = 726889824.

The previous prime is 1272057211. The next prime is 1272057233. The reversal of 1272057213 is 3127502721.

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

It is not a de Polignac number, because 1272057213 - 2¹ = 1272057211 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 (1272057211) 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 7 ways as a sum of consecutive naturals, for example, 30287056 + ... + 30287097.

It is an arithmetic number, because the mean of its divisors is an integer number (242296616).

Almost surely, 2^1272057213 is an apocalyptic number.

It is an amenable number.

1272057213 is a deficient number, since it is larger than the sum of its proper divisors (666315715).

1272057213 is an equidigital number, since it uses as much as digits as its factorization.

1272057213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60574163.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 1272057213 is about 35665.9110776663. The cubic root of 1272057213 is about 1083.5165475902.

Adding to 1272057213 its reverse (3127502721), we get a palindrome (4399559934).

The spelling of 1272057213 in words is "one billion, two hundred seventy-two million, fifty-seven thousand, two hundred thirteen".