12031105 has 8 divisors (see below), whose sum is σ = 14827752. Its totient is φ = 9364608.

The previous prime is 12031079. The next prime is 12031111. The reversal of 12031105 is 50113021.

It can be written as a sum of positive squares in 4 ways, for example, as 6385729 + 5645376 = 2527^2 + 2376^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12031105 - 2¹¹ = 12029057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 32332 + ... + 32701.

It is an arithmetic number, because the mean of its divisors is an integer number (1853469).

Almost surely, 2^12031105 is an apocalyptic number.

It is an amenable number.

12031105 is a deficient number, since it is larger than the sum of its proper divisors (2796647).

12031105 is an equidigital number, since it uses as much as digits as its factorization.

12031105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65075.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 12031105 is about 3468.5883295658. The cubic root of 12031105 is about 229.1404908211.

Adding to 12031105 its reverse (50113021), we get a palindrome (62144126).

It can be divided in two parts, 12031 and 105, that multiplied together give a triangular number (1263255 = T₁₅₈₉).

The spelling of 12031105 in words is "twelve million, thirty-one thousand, one hundred five".