12126731 has 8 divisors (see below), whose sum is σ = 13062720. Its totient is φ = 11220552.

The previous prime is 12126707. The next prime is 12126733. The reversal of 12126731 is 13762121.

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 12126731 - 2¹⁴ = 12110347 is a prime.

It is a super-2 number, since 2×12126731² = 294115209492722, 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 = 12126697 and 12126706.

It is not an unprimeable number, because it can be changed into a prime (12126733) 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, 6605 + ... + 8238.

It is an arithmetic number, because the mean of its divisors is an integer number (1632840).

Almost surely, 2^12126731 is an apocalyptic number.

12126731 is a deficient number, since it is larger than the sum of its proper divisors (935989).

12126731 is a wasteful number, since it uses less digits than its factorization.

12126731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14905.

The product of its digits is 504, while the sum is 23.

The square root of 12126731 is about 3482.3456175400. The cubic root of 12126731 is about 229.7459766362.

Adding to 12126731 its reverse (13762121), we get a palindrome (25888852).

The spelling of 12126731 in words is "twelve million, one hundred twenty-six thousand, seven hundred thirty-one".