1272651629 has 2 divisors, whose sum is σ = 1272651630. Its totient is φ = 1272651628.

The previous prime is 1272651581. The next prime is 1272651647. The reversal of 1272651629 is 9261562721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 771339529 + 501312100 = 27773^2 + 22390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272651629 - 2¹⁶ = 1272586093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272651329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636325814 + 636325815.

It is an arithmetic number, because the mean of its divisors is an integer number (636325815).

Almost surely, 2^1272651629 is an apocalyptic number.

It is an amenable number.

1272651629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272651629 is an equidigital number, since it uses as much as digits as its factorization.

1272651629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 1272651629 is about 35674.2432155190. The cubic root of 1272651629 is about 1083.6852924315.

The spelling of 1272651629 in words is "one billion, two hundred seventy-two million, six hundred fifty-one thousand, six hundred twenty-nine".