12730031 has 4 divisors (see below), whose sum is σ = 12811272. Its totient is φ = 12648792.

The previous prime is 12730027. The next prime is 12730033. The reversal of 12730031 is 13003721.

12730031 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13003721 = 71 ⋅183151.

It is a cyclic number.

It is not a de Polignac number, because 12730031 - 2² = 12730027 is a prime.

It is a super-2 number, since 2×12730031² = 324107378521922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12729991 and 12730009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12730033) 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, 40385 + ... + 40698.

It is an arithmetic number, because the mean of its divisors is an integer number (3202818).

Almost surely, 2^12730031 is an apocalyptic number.

12730031 is a deficient number, since it is larger than the sum of its proper divisors (81241).

12730031 is an equidigital number, since it uses as much as digits as its factorization.

12730031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81240.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 12730031 is about 3567.9168992565. The cubic root of 12730031 is about 233.4944096408.

Adding to 12730031 its reverse (13003721), we get a palindrome (25733752).

The spelling of 12730031 in words is "twelve million, seven hundred thirty thousand, thirty-one".