1252581513 has 8 divisors (see below), whose sum is σ = 1674077376. Its totient is φ = 833070000.

The previous prime is 1252581511. The next prime is 1252581557. The reversal of 1252581513 is 3151852521.

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

It is not a de Polignac number, because 1252581513 - 2¹ = 1252581511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1252581511) 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, 494613 + ... + 497138.

It is an arithmetic number, because the mean of its divisors is an integer number (209259672).

Almost surely, 2^1252581513 is an apocalyptic number.

It is an amenable number.

1252581513 is a deficient number, since it is larger than the sum of its proper divisors (421495863).

1252581513 is an equidigital number, since it uses as much as digits as its factorization.

1252581513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992175.

The product of its digits is 12000, while the sum is 33.

The square root of 1252581513 is about 35391.8283364960. The cubic root of 1252581513 is about 1077.9583952629.

The spelling of 1252581513 in words is "one billion, two hundred fifty-two million, five hundred eighty-one thousand, five hundred thirteen".