1252816117 has 4 divisors (see below), whose sum is σ = 1431789856. Its totient is φ = 1073842380.

The previous prime is 1252816079. The next prime is 1252816127. The reversal of 1252816117 is 7116182521.

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.

It is a cyclic number.

It is not a de Polignac number, because 1252816117 - 2¹⁵ = 1252783349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252816127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89486859 + ... + 89486872.

It is an arithmetic number, because the mean of its divisors is an integer number (357947464).

Almost surely, 2^1252816117 is an apocalyptic number.

It is an amenable number.

1252816117 is a deficient number, since it is larger than the sum of its proper divisors (178973739).

1252816117 is an equidigital number, since it uses as much as digits as its factorization.

1252816117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178973738.

The product of its digits is 6720, while the sum is 34.

The square root of 1252816117 is about 35395.1425622217. The cubic root of 1252816117 is about 1078.0256903017.

Adding to 1252816117 its reverse (7116182521), we get a palindrome (8368998638).

The spelling of 1252816117 in words is "one billion, two hundred fifty-two million, eight hundred sixteen thousand, one hundred seventeen".