12186045 has 20 divisors (see below), whose sum is σ = 21845340. Its totient is φ = 6499008.

The previous prime is 12186023. The next prime is 12186047. The reversal of 12186045 is 54068121.

It can be written as a sum of positive squares in 2 ways, for example, as 5184729 + 7001316 = 2277^2 + 2646^2 .

It is not a de Polignac number, because 12186045 - 2⁶ = 12185981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12186047) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14640 + ... + 15449.

It is an arithmetic number, because the mean of its divisors is an integer number (1092267).

Almost surely, 2^12186045 is an apocalyptic number.

12186045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12186045 is a deficient number, since it is larger than the sum of its proper divisors (9659295).

12186045 is an equidigital number, since it uses as much as digits as its factorization.

12186045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30106 (or 30097 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12186045 is about 3490.8516152939. The cubic root of 12186045 is about 230.1199437403.

The spelling of 12186045 in words is "twelve million, one hundred eighty-six thousand, forty-five".