1272316061 has 4 divisors (see below), whose sum is σ = 1293880800. Its totient is φ = 1250751324.

The previous prime is 1272316037. The next prime is 1272316063. The reversal of 1272316061 is 1606132721.

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: 1606132721 = 1087 ⋅1477583.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1272316061 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 (1272316063) 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, 10782281 + ... + 10782398.

It is an arithmetic number, because the mean of its divisors is an integer number (323470200).

Almost surely, 2^1272316061 is an apocalyptic number.

It is an amenable number.

1272316061 is a deficient number, since it is larger than the sum of its proper divisors (21564739).

1272316061 is an equidigital number, since it uses as much as digits as its factorization.

1272316061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21564738.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1272316061 is about 35669.5396802370. The cubic root of 1272316061 is about 1083.5900367034.

Adding to 1272316061 its reverse (1606132721), we get a palindrome (2878448782).

The spelling of 1272316061 in words is "one billion, two hundred seventy-two million, three hundred sixteen thousand, sixty-one".