1277513129 has 2 divisors, whose sum is σ = 1277513130. Its totient is φ = 1277513128.

The previous prime is 1277513119. The next prime is 1277513189. The reversal of 1277513129 is 9213157721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1150905625 + 126607504 = 33925^2 + 11252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277513129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1277513092 and 1277513101.

It is not a weakly prime, because it can be changed into another prime (1277513119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638756564 + 638756565.

It is an arithmetic number, because the mean of its divisors is an integer number (638756565).

Almost surely, 2^1277513129 is an apocalyptic number.

It is an amenable number.

1277513129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277513129 is an equidigital number, since it uses as much as digits as its factorization.

1277513129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 38.

The square root of 1277513129 is about 35742.3156636500. The cubic root of 1277513129 is about 1085.0634234199.

The spelling of 1277513129 in words is "one billion, two hundred seventy-seven million, five hundred thirteen thousand, one hundred twenty-nine".