1252755217 has 12 divisors (see below), whose sum is σ = 1471721076. Its totient is φ = 1063154400.

The previous prime is 1252755209. The next prime is 1252755221. The reversal of 1252755217 is 7125572521.

It can be written as a sum of positive squares in 2 ways, for example, as 1047234321 + 205520896 = 32361^2 + 14336^2 .

It is not a de Polignac number, because 1252755217 - 2³ = 1252755209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1252755247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121618 + ... + 131515.

It is an arithmetic number, because the mean of its divisors is an integer number (122643423).

Almost surely, 2^1252755217 is an apocalyptic number.

It is an amenable number.

1252755217 is a deficient number, since it is larger than the sum of its proper divisors (218965859).

1252755217 is a wasteful number, since it uses less digits than its factorization.

1252755217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253248 (or 253241 counting only the distinct ones).

The product of its digits is 49000, while the sum is 37.

The square root of 1252755217 is about 35394.2822642302. The cubic root of 1252755217 is about 1078.0082222345.

The spelling of 1252755217 in words is "one billion, two hundred fifty-two million, seven hundred fifty-five thousand, two hundred seventeen".