12655861 has 8 divisors (see below), whose sum is σ = 13155480. Its totient is φ = 12160512.

The previous prime is 12655859. The next prime is 12655873. The reversal of 12655861 is 16855621.

It is a happy number.

12655861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 53361 + 12602500 = 231^2 + 3550^2 .

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

It is not a de Polignac number, because 12655861 - 2¹ = 12655859 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 (12655801) 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, 5821 + ... + 7693.

It is an arithmetic number, because the mean of its divisors is an integer number (1644435).

Almost surely, 2^12655861 is an apocalyptic number.

It is an amenable number.

12655861 is a deficient number, since it is larger than the sum of its proper divisors (499619).

12655861 is a wasteful number, since it uses less digits than its factorization.

12655861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135.

The product of its digits is 14400, while the sum is 34.

The square root of 12655861 is about 3557.5076950022. The cubic root of 12655861 is about 233.0400503400.

The spelling of 12655861 in words is "twelve million, six hundred fifty-five thousand, eight hundred sixty-one".