12661954 has 8 divisors (see below), whose sum is σ = 19119168. Its totient is φ = 6288900.

The previous prime is 12661949. The next prime is 12661973. The reversal of 12661954 is 45916621.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20662 + ... + 21265.

It is an arithmetic number, because the mean of its divisors is an integer number (2389896).

Almost surely, 2^12661954 is an apocalyptic number.

12661954 is a deficient number, since it is larger than the sum of its proper divisors (6457214).

12661954 is a wasteful number, since it uses less digits than its factorization.

12661954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42080.

The product of its digits is 12960, while the sum is 34.

The square root of 12661954 is about 3558.3639499073. The cubic root of 12661954 is about 233.0774423757.

The spelling of 12661954 in words is "twelve million, six hundred sixty-one thousand, nine hundred fifty-four".