1252312517 has 4 divisors (see below), whose sum is σ = 1254707520. Its totient is φ = 1249917516.

The previous prime is 1252312513. The next prime is 1252312571. The reversal of 1252312517 is 7152132521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7152132521 = 277 ⋅25819973.

It is a cyclic number.

It is not a de Polignac number, because 1252312517 - 2² = 1252312513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1252312517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252312511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196717 + ... + 1197762.

It is an arithmetic number, because the mean of its divisors is an integer number (313676880).

Almost surely, 2^1252312517 is an apocalyptic number.

It is an amenable number.

1252312517 is a deficient number, since it is larger than the sum of its proper divisors (2395003).

1252312517 is an equidigital number, since it uses as much as digits as its factorization.

1252312517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395002.

The product of its digits is 4200, while the sum is 29.

The square root of 1252312517 is about 35388.0278766704. The cubic root of 1252312517 is about 1077.8812247014.

The spelling of 1252312517 in words is "one billion, two hundred fifty-two million, three hundred twelve thousand, five hundred seventeen".