12755731 has 4 divisors (see below), whose sum is σ = 13310352. Its totient is φ = 12201112.

The previous prime is 12755723. The next prime is 12755749. The reversal of 12755731 is 13755721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12755731 - 2³ = 12755723 is a prime.

It is a super-2 number, since 2×12755731² = 325417346688722, 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 = 12755693 and 12755702.

It is not an unprimeable number, because it can be changed into a prime (12755761) 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, 277276 + ... + 277321.

It is an arithmetic number, because the mean of its divisors is an integer number (3327588).

Almost surely, 2^12755731 is an apocalyptic number.

12755731 is a deficient number, since it is larger than the sum of its proper divisors (554621).

12755731 is an equidigital number, since it uses as much as digits as its factorization.

12755731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554620.

The product of its digits is 7350, while the sum is 31.

The square root of 12755731 is about 3571.5166246288. The cubic root of 12755731 is about 233.6514339405.

The spelling of 12755731 in words is "twelve million, seven hundred fifty-five thousand, seven hundred thirty-one".