12005698 has 4 divisors (see below), whose sum is σ = 18008550. Its totient is φ = 6002848.

The previous prime is 12005683. The next prime is 12005699. The reversal of 12005698 is 89650021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89650021 = 23 ⋅3897827.

It can be written as a sum of positive squares in only one way, i.e., 11108889 + 896809 = 3333^2 + 947^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

12005698 is a modest number, since divided by 5698 gives 12 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12005699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3001423 + ... + 3001426.

Almost surely, 2^12005698 is an apocalyptic number.

12005698 is a deficient number, since it is larger than the sum of its proper divisors (6002852).

12005698 is an equidigital number, since it uses as much as digits as its factorization.

12005698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002851.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 12005698 is about 3464.9239529894. The cubic root of 12005698 is about 228.9790793420.

The spelling of 12005698 in words is "twelve million, five thousand, six hundred ninety-eight".