12724031257 has 8 divisors (see below), whose sum is σ = 14542908800. Its totient is φ = 10905443424.

The previous prime is 12724031237. The next prime is 12724031263. The reversal of 12724031257 is 75213042721.

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 12724031257 - 2⁷ = 12724031129 is a prime.

It is a super-2 number, since 2×12724031257² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12724031237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31669 + ... + 162637.

It is an arithmetic number, because the mean of its divisors is an integer number (1817863600).

Almost surely, 2^12724031257 is an apocalyptic number.

It is an amenable number.

12724031257 is a deficient number, since it is larger than the sum of its proper divisors (1818877543).

12724031257 is a wasteful number, since it uses less digits than its factorization.

12724031257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144855.

The product of its (nonzero) digits is 23520, while the sum is 34.

Adding to 12724031257 its reverse (75213042721), we get a palindrome (87937073978).

The spelling of 12724031257 in words is "twelve billion, seven hundred twenty-four million, thirty-one thousand, two hundred fifty-seven".