12105501 has 8 divisors (see below), whose sum is σ = 16161504. Its totient is φ = 8059920.

The previous prime is 12105491. The next prime is 12105523. The reversal of 12105501 is 10550121.

12105501 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12105501 - 2¹¹ = 12103453 is a prime.

It is a super-2 number, since 2×12105501² = 293086308922002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12105551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 711 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (2020188).

Almost surely, 2^12105501 is an apocalyptic number.

12105501 is the 2841-st pentagonal number.

12105501 is the 2201-st centered pentagonal number.

It is an amenable number.

12105501 is a deficient number, since it is larger than the sum of its proper divisors (4056003).

12105501 is an equidigital number, since it uses as much as digits as its factorization.

12105501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 12105501 is about 3479.2960494905. The cubic root of 12105501 is about 229.6118279204.

Adding to 12105501 its reverse (10550121), we get a palindrome (22655622).

The spelling of 12105501 in words is "twelve million, one hundred five thousand, five hundred one".