12661948 has 24 divisors (see below), whose sum is σ = 24449040. Its totient is φ = 5700480.

The previous prime is 12661903. The next prime is 12661949. The reversal of 12661948 is 84916621.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838 + ... + 5101.

It is an arithmetic number, because the mean of its divisors is an integer number (1018710).

Almost surely, 2^12661948 is an apocalyptic number.

It is an amenable number.

12661948 is a deficient number, since it is larger than the sum of its proper divisors (11787092).

12661948 is a wasteful number, since it uses less digits than its factorization.

12661948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5997 (or 5995 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 12661948 is about 3558.3631068231. The cubic root of 12661948 is about 233.0774055603.

The spelling of 12661948 in words is "twelve million, six hundred sixty-one thousand, nine hundred forty-eight".