12261663 has 6 divisors (see below), whose sum is σ = 17711304. Its totient is φ = 8174436.

The previous prime is 12261659. The next prime is 12261677. The reversal of 12261663 is 36616221.

It is not a de Polignac number, because 12261663 - 2² = 12261659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 681195 + ... + 681212.

It is an arithmetic number, because the mean of its divisors is an integer number (2951884).

Almost surely, 2^12261663 is an apocalyptic number.

12261663 is a deficient number, since it is larger than the sum of its proper divisors (5449641).

12261663 is a wasteful number, since it uses less digits than its factorization.

12261663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362413 (or 1362410 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 12261663 is about 3501.6657464698. The cubic root of 12261663 is about 230.5949499261.

Adding to 12261663 its reverse (36616221), we get a palindrome (48877884).

The spelling of 12261663 in words is "twelve million, two hundred sixty-one thousand, six hundred sixty-three".