12013506 has 12 divisors (see below), whose sum is σ = 26029302. Its totient is φ = 4004496.

The previous prime is 12013501. The next prime is 12013517. The reversal of 12013506 is 60531021.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 1418481 = 3255^2 + 1191^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 667417 = 12013506 / (1 + 2 + 0 + 1 + 3 + 5 + 0 + 6).

It is not an unprimeable number, because it can be changed into a prime (12013501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 333691 + ... + 333726.

Almost surely, 2^12013506 is an apocalyptic number.

12013506 is an abundant number, since it is smaller than the sum of its proper divisors (14015796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12013506 is a wasteful number, since it uses less digits than its factorization.

12013506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667425 (or 667422 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 12013506 is about 3466.0504901112. The cubic root of 12013506 is about 229.0287080324.

Adding to 12013506 its reverse (60531021), we get a palindrome (72544527).

The spelling of 12013506 in words is "twelve million, thirteen thousand, five hundred six".