1252789493 has 4 divisors (see below), whose sum is σ = 1255185408. Its totient is φ = 1250393580.

The previous prime is 1252789471. The next prime is 1252789511. The reversal of 1252789493 is 3949872521.

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: 3949872521 = 7 ⋅564267503.

It is a cyclic number.

It is not a de Polignac number, because 1252789493 - 2²² = 1248595189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252789403) 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, 1197173 + ... + 1198218.

It is an arithmetic number, because the mean of its divisors is an integer number (313796352).

Almost surely, 2^1252789493 is an apocalyptic number.

It is an amenable number.

1252789493 is a deficient number, since it is larger than the sum of its proper divisors (2395915).

1252789493 is an equidigital number, since it uses as much as digits as its factorization.

1252789493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395914.

The product of its digits is 1088640, while the sum is 50.

The square root of 1252789493 is about 35394.7664634194. The cubic root of 1252789493 is about 1078.0180537568.

The spelling of 1252789493 in words is "one billion, two hundred fifty-two million, seven hundred eighty-nine thousand, four hundred ninety-three".