12105530 has 16 divisors (see below), whose sum is σ = 23072040. Its totient is φ = 4557312.

The previous prime is 12105529. The next prime is 12105551. The reversal of 12105530 is 3550121.

It can be written as a sum of positive squares in 4 ways, for example, as 7513081 + 4592449 = 2741^2 + 2143^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 12105499 and 12105508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35435 + ... + 35774.

Almost surely, 2^12105530 is an apocalyptic number.

12105530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12105530 is a deficient number, since it is larger than the sum of its proper divisors (10966510).

12105530 is a wasteful number, since it uses less digits than its factorization.

12105530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71233.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 12105530 is about 3479.3002169977. The cubic root of 12105530 is about 229.6120112734.

Adding to 12105530 its reverse (3550121), we get a palindrome (15655651).

The spelling of 12105530 in words is "twelve million, one hundred five thousand, five hundred thirty".