12018961 has 4 divisors (see below), whose sum is σ = 12052800. Its totient is φ = 11985124.

The previous prime is 12018953. The next prime is 12018977. The reversal of 12018961 is 16981021.

It is a happy number.

12018961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12018961 - 2³ = 12018953 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12018901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16381 + ... + 17098.

It is an arithmetic number, because the mean of its divisors is an integer number (3013200).

Almost surely, 2^12018961 is an apocalyptic number.

It is an amenable number.

12018961 is a deficient number, since it is larger than the sum of its proper divisors (33839).

12018961 is an equidigital number, since it uses as much as digits as its factorization.

12018961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33838.

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

The square root of 12018961 is about 3466.8373195176. The cubic root of 12018961 is about 229.0633679824.

Adding to 12018961 its reverse (16981021), we get a palindrome (28999982).

The spelling of 12018961 in words is "twelve million, eighteen thousand, nine hundred sixty-one".