12543771 has 4 divisors (see below), whose sum is σ = 16725032. Its totient is φ = 8362512.

The previous prime is 12543767. The next prime is 12543779. The reversal of 12543771 is 17734521.

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

It is not a de Polignac number, because 12543771 - 2² = 12543767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12543779) 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, 2090626 + ... + 2090631.

It is an arithmetic number, because the mean of its divisors is an integer number (4181258).

Almost surely, 2^12543771 is an apocalyptic number.

12543771 is a deficient number, since it is larger than the sum of its proper divisors (4181261).

12543771 is an equidigital number, since it uses as much as digits as its factorization.

12543771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181260.

The product of its digits is 5880, while the sum is 30.

The square root of 12543771 is about 3541.7186505989. The cubic root of 12543771 is about 232.3500154182.

The spelling of 12543771 in words is "twelve million, five hundred forty-three thousand, seven hundred seventy-one".