12081961 has 8 divisors (see below), whose sum is σ = 12551040. Its totient is φ = 11621808.

The previous prime is 12081947. The next prime is 12081973. The reversal of 12081961 is 16918021.

It is a happy number.

12081961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12081961 - 2⁹ = 12081449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12081941) 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, 595 + ... + 4951.

It is an arithmetic number, because the mean of its divisors is an integer number (1568880).

Almost surely, 2^12081961 is an apocalyptic number.

It is an amenable number.

12081961 is a deficient number, since it is larger than the sum of its proper divisors (469079).

12081961 is an equidigital number, since it uses as much as digits as its factorization.

12081961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4463.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 12081961 is about 3475.9115351228. The cubic root of 12081961 is about 229.4628992164.

Adding to 12081961 its reverse (16918021), we get a palindrome (28999982).

The spelling of 12081961 in words is "twelve million, eighty-one thousand, nine hundred sixty-one".