1252558643 has 8 divisors (see below), whose sum is σ = 1434438912. Its totient is φ = 1071414216.

The previous prime is 1252558639. The next prime is 1252558649. The reversal of 1252558643 is 3468552521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1252558643 - 2² = 1252558639 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 1252558643.

It is not an unprimeable number, because it can be changed into a prime (1252558649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180305 + ... + 187122.

It is an arithmetic number, because the mean of its divisors is an integer number (179304864).

Almost surely, 2^1252558643 is an apocalyptic number.

1252558643 is a deficient number, since it is larger than the sum of its proper divisors (181880269).

1252558643 is an equidigital number, since it uses as much as digits as its factorization.

1252558643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367921.

The product of its digits is 288000, while the sum is 41.

The square root of 1252558643 is about 35391.5052378392. The cubic root of 1252558643 is about 1077.9518346630.

The spelling of 1252558643 in words is "one billion, two hundred fifty-two million, five hundred fifty-eight thousand, six hundred forty-three".