1265000129 has 2 divisors, whose sum is σ = 1265000130. Its totient is φ = 1265000128.

The previous prime is 1265000119. The next prime is 1265000147. The reversal of 1265000129 is 9210005621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997612225 + 267387904 = 31585^2 + 16352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265000129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1265000098 and 1265000107.

It is not a weakly prime, because it can be changed into another prime (1265000119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632500064 + 632500065.

It is an arithmetic number, because the mean of its divisors is an integer number (632500065).

Almost surely, 2^1265000129 is an apocalyptic number.

It is an amenable number.

1265000129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265000129 is an equidigital number, since it uses as much as digits as its factorization.

1265000129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1265000129 is about 35566.8403010445. The cubic root of 1265000129 is about 1081.5091296732.

The spelling of 1265000129 in words is "one billion, two hundred sixty-five million, one hundred twenty-nine", and thus it is an aban number.