12777231 has 16 divisors (see below), whose sum is σ = 17418240. Its totient is φ = 8329440.

The previous prime is 12777221. The next prime is 12777277. The reversal of 12777231 is 13277721.

It is not a de Polignac number, because 12777231 - 2¹⁰ = 12776207 is a prime.

It is a super-2 number, since 2×12777231² = 326515264054722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12777221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47365 + ... + 47633.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^12777231 is an apocalyptic number.

12777231 is a deficient number, since it is larger than the sum of its proper divisors (4641009).

12777231 is a wasteful number, since it uses less digits than its factorization.

12777231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566.

The product of its digits is 4116, while the sum is 30.

The square root of 12777231 is about 3574.5252831670. The cubic root of 12777231 is about 233.7826347336.

The spelling of 12777231 in words is "twelve million, seven hundred seventy-seven thousand, two hundred thirty-one".