1271924897 has 2 divisors, whose sum is σ = 1271924898. Its totient is φ = 1271924896.

The previous prime is 1271924893. The next prime is 1271924903. The reversal of 1271924897 is 7984291721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1224370081 + 47554816 = 34991^2 + 6896^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271924897 - 2² = 1271924893 is a prime.

It is a super-3 number, since 3×1271924897³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1271924893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635962448 + 635962449.

It is an arithmetic number, because the mean of its divisors is an integer number (635962449).

Almost surely, 2^1271924897 is an apocalyptic number.

It is an amenable number.

1271924897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271924897 is an equidigital number, since it uses as much as digits as its factorization.

1271924897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The square root of 1271924897 is about 35664.0560929348. The cubic root of 1271924897 is about 1083.4789781200.

The spelling of 1271924897 in words is "one billion, two hundred seventy-one million, nine hundred twenty-four thousand, eight hundred ninety-seven".