12731737 has 8 divisors (see below), whose sum is σ = 13292552. Its totient is φ = 12182400.

The previous prime is 12731723. The next prime is 12731743. The reversal of 12731737 is 73713721.

It can be written as a sum of positive squares in 4 ways, for example, as 4756761 + 7974976 = 2181^2 + 2824^2 .

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 12731737 - 2¹⁵ = 12698969 is a prime.

It is a super-3 number, since 3×12731737³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12731699 and 12731708.

It is not an unprimeable number, because it can be changed into a prime (12731707) 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, 564 + ... + 5077.

It is an arithmetic number, because the mean of its divisors is an integer number (1661569).

Almost surely, 2^12731737 is an apocalyptic number.

12731737 is the 2257-th heptagonal number.

It is an amenable number.

12731737 is a deficient number, since it is larger than the sum of its proper divisors (560815).

12731737 is an equidigital number, since it uses as much as digits as its factorization.

12731737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5739.

The product of its digits is 6174, while the sum is 31.

The square root of 12731737 is about 3568.1559663221. The cubic root of 12731737 is about 233.5048396669.

The spelling of 12731737 in words is "twelve million, seven hundred thirty-one thousand, seven hundred thirty-seven".