12861261 has 24 divisors (see below), whose sum is σ = 22020544. Its totient is φ = 7348320.

The previous prime is 12861259. The next prime is 12861269. The reversal of 12861261 is 16216821.

It is not a de Polignac number, because 12861261 - 2¹ = 12861259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12861269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2080 + ... + 5481.

Almost surely, 2^12861261 is an apocalyptic number.

It is an amenable number.

12861261 is a deficient number, since it is larger than the sum of its proper divisors (9159283).

12861261 is an frugal number, since it uses more digits than its factorization.

12861261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7583 (or 7571 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 12861261 is about 3586.2600296130. The cubic root of 12861261 is about 234.2940091359.

The spelling of 12861261 in words is "twelve million, eight hundred sixty-one thousand, two hundred sixty-one".