1255515017 has 2 divisors, whose sum is σ = 1255515018. Its totient is φ = 1255515016.

The previous prime is 1255515013. The next prime is 1255515029. The reversal of 1255515017 is 7105155521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1033236736 + 222278281 = 32144^2 + 14909^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255515017 - 2² = 1255515013 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255515011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627757508 + 627757509.

It is an arithmetic number, because the mean of its divisors is an integer number (627757509).

Almost surely, 2^1255515017 is an apocalyptic number.

It is an amenable number.

1255515017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255515017 is an equidigital number, since it uses as much as digits as its factorization.

1255515017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8750, while the sum is 32.

The square root of 1255515017 is about 35433.2473391870. The cubic root of 1255515017 is about 1078.7992533503.

It can be divided in two parts, 12555 and 15017, that added together give a palindrome (27572).

The spelling of 1255515017 in words is "one billion, two hundred fifty-five million, five hundred fifteen thousand, seventeen".