12777243 has 8 divisors (see below), whose sum is σ = 17315856. Its totient is φ = 8378400.

The previous prime is 12777221. The next prime is 12777277. The reversal of 12777243 is 34277721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12777243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12777203) 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, 34728 + ... + 35093.

It is an arithmetic number, because the mean of its divisors is an integer number (2164482).

Almost surely, 2^12777243 is an apocalyptic number.

12777243 is a deficient number, since it is larger than the sum of its proper divisors (4538613).

12777243 is an equidigital number, since it uses as much as digits as its factorization.

12777243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69885.

The product of its digits is 16464, while the sum is 33.

The square root of 12777243 is about 3574.5269617112. The cubic root of 12777243 is about 233.7827079208.

It can be divided in two parts, 12 and 777243, that multiplied together give a square (9326916 = 3054²).

The spelling of 12777243 in words is "twelve million, seven hundred seventy-seven thousand, two hundred forty-three".