12661955 has 8 divisors (see below), whose sum is σ = 15605232. Its totient is φ = 9855648.

The previous prime is 12661949. The next prime is 12661973. The reversal of 12661955 is 55916621.

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

It is a cyclic number.

It is not a de Polignac number, because 12661955 - 2⁸ = 12661699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34037 + ... + 34406.

It is an arithmetic number, because the mean of its divisors is an integer number (1950654).

Almost surely, 2^12661955 is an apocalyptic number.

12661955 is a deficient number, since it is larger than the sum of its proper divisors (2943277).

12661955 is an equidigital number, since it uses as much as digits as its factorization.

12661955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68485.

The product of its digits is 16200, while the sum is 35.

The square root of 12661955 is about 3558.3640904213. The cubic root of 12661955 is about 233.0774485116.

The spelling of 12661955 in words is "twelve million, six hundred sixty-one thousand, nine hundred fifty-five".