1271012537 has 2 divisors, whose sum is σ = 1271012538. Its totient is φ = 1271012536.

The previous prime is 1271012521. The next prime is 1271012539. The reversal of 1271012537 is 7352101721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185838096 + 85174441 = 34436^2 + 9229^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271012537 - 2⁴ = 1271012521 is a prime.

It is a super-2 number, since 2×1271012537² = 3230945738422352738, which contains 22 as substring.

Together with 1271012539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1271012539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635506268 + 635506269.

It is an arithmetic number, because the mean of its divisors is an integer number (635506269).

Almost surely, 2^1271012537 is an apocalyptic number.

It is an amenable number.

1271012537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271012537 is an equidigital number, since it uses as much as digits as its factorization.

1271012537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 1271012537 is about 35651.2627686594. The cubic root of 1271012537 is about 1083.2198539806.

The spelling of 1271012537 in words is "one billion, two hundred seventy-one million, twelve thousand, five hundred thirty-seven".