12655945 has 4 divisors (see below), whose sum is σ = 15187140. Its totient is φ = 10124752.

The previous prime is 12655943. The next prime is 12655949. The reversal of 12655945 is 54955621.

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 1923769 + 10732176 = 1387^2 + 3276^2 .

It is a cyclic number.

It is not a de Polignac number, because 12655945 - 2¹ = 12655943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12655943) 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, 1265590 + ... + 1265599.

It is an arithmetic number, because the mean of its divisors is an integer number (3796785).

Almost surely, 2^12655945 is an apocalyptic number.

It is an amenable number.

12655945 is a deficient number, since it is larger than the sum of its proper divisors (2531195).

12655945 is an equidigital number, since it uses as much as digits as its factorization.

12655945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531194.

The product of its digits is 54000, while the sum is 37.

The square root of 12655945 is about 3557.5195010007. The cubic root of 12655945 is about 233.0405659198.

The spelling of 12655945 in words is "twelve million, six hundred fifty-five thousand, nine hundred forty-five".