12004523 has 4 divisors (see below), whose sum is σ = 12636360. Its totient is φ = 11372688.

The previous prime is 12004519. The next prime is 12004529. The reversal of 12004523 is 32540021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12004523 - 2² = 12004519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12004529) 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, 315890 + ... + 315927.

It is an arithmetic number, because the mean of its divisors is an integer number (3159090).

Almost surely, 2^12004523 is an apocalyptic number.

12004523 is a deficient number, since it is larger than the sum of its proper divisors (631837).

12004523 is an equidigital number, since it uses as much as digits as its factorization.

12004523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631836.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 12004523 is about 3464.7543924498. The cubic root of 12004523 is about 228.9716090226.

Adding to 12004523 its reverse (32540021), we get a palindrome (44544544).

The spelling of 12004523 in words is "twelve million, four thousand, five hundred twenty-three".