12099961 has 8 divisors (see below), whose sum is σ = 12442248. Its totient is φ = 11760000.

The previous prime is 12099959. The next prime is 12099991. The reversal of 12099961 is 16999021.

12099961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24336 + 12075625 = 156^2 + 3475^2 .

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 12099961 - 2¹ = 12099959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12099961.

It is not an unprimeable number, because it can be changed into a prime (12099911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16911 + ... + 17611.

It is an arithmetic number, because the mean of its divisors is an integer number (1555281).

Almost surely, 2^12099961 is an apocalyptic number.

It is an amenable number.

12099961 is a deficient number, since it is larger than the sum of its proper divisors (342287).

12099961 is an equidigital number, since it uses as much as digits as its factorization.

12099961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 12099961 is about 3478.4998203248. The cubic root of 12099961 is about 229.5767958133.

The spelling of 12099961 in words is "twelve million, ninety-nine thousand, nine hundred sixty-one".