12005331 has 16 divisors (see below), whose sum is σ = 17300640. Its totient is φ = 7361280.

The previous prime is 12005327. The next prime is 12005341. The reversal of 12005331 is 13350021.

It is a happy number.

It is not a de Polignac number, because 12005331 - 2² = 12005327 is a prime.

It is a super-2 number, since 2×12005331² = 288255944839122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12005331.

It is not an unprimeable number, because it can be changed into a prime (12005341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20815 + ... + 21383.

It is an arithmetic number, because the mean of its divisors is an integer number (1081290).

Almost surely, 2^12005331 is an apocalyptic number.

12005331 is a deficient number, since it is larger than the sum of its proper divisors (5295309).

12005331 is a wasteful number, since it uses less digits than its factorization.

12005331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 12005331 is about 3464.8709932694. The cubic root of 12005331 is about 228.9767461116.

Adding to 12005331 its reverse (13350021), we get a palindrome (25355352).

The spelling of 12005331 in words is "twelve million, five thousand, three hundred thirty-one".