12872261 has 4 divisors (see below), whose sum is σ = 12885132. Its totient is φ = 12859392.

The previous prime is 12872239. The next prime is 12872287. The reversal of 12872261 is 16227821.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11356900 + 1515361 = 3370^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 12872261 - 2¹⁴ = 12855877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12872231) 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, 4796 + ... + 6981.

It is an arithmetic number, because the mean of its divisors is an integer number (3221283).

Almost surely, 2^12872261 is an apocalyptic number.

It is an amenable number.

12872261 is a deficient number, since it is larger than the sum of its proper divisors (12871).

12872261 is a wasteful number, since it uses less digits than its factorization.

12872261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12870.

The product of its digits is 2688, while the sum is 29.

The square root of 12872261 is about 3587.7933329555. The cubic root of 12872261 is about 234.3607858876.

The spelling of 12872261 in words is "twelve million, eight hundred seventy-two thousand, two hundred sixty-one".