12081623 has 4 divisors (see below), whose sum is σ = 12091488. Its totient is φ = 12071760.

The previous prime is 12081613. The next prime is 12081631. The reversal of 12081623 is 32618021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12081623 - 2¹⁶ = 12016087 is a prime.

It is a super-2 number, since 2×12081623² = 291931228628258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12081613) 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, 2783 + ... + 5648.

It is an arithmetic number, because the mean of its divisors is an integer number (3022872).

Almost surely, 2^12081623 is an apocalyptic number.

12081623 is a deficient number, since it is larger than the sum of its proper divisors (9865).

12081623 is an equidigital number, since it uses as much as digits as its factorization.

12081623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9864.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 12081623 is about 3475.8629144430. The cubic root of 12081623 is about 229.4607594097.

Adding to 12081623 its reverse (32618021), we get a palindrome (44699644).

The spelling of 12081623 in words is "twelve million, eighty-one thousand, six hundred twenty-three".