12013527 has 4 divisors (see below), whose sum is σ = 16018040. Its totient is φ = 8009016.

The previous prime is 12013517. The next prime is 12013531. The reversal of 12013527 is 72531021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12013527 - 2²³ = 3624919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2002252 + ... + 2002257.

It is an arithmetic number, because the mean of its divisors is an integer number (4004510).

Almost surely, 2^12013527 is an apocalyptic number.

12013527 is a deficient number, since it is larger than the sum of its proper divisors (4004513).

12013527 is an equidigital number, since it uses as much as digits as its factorization.

12013527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004512.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 12013527 is about 3466.0535194945. The cubic root of 12013527 is about 229.0288414822.

Adding to 12013527 its reverse (72531021), we get a palindrome (84544548).

The spelling of 12013527 in words is "twelve million, thirteen thousand, five hundred twenty-seven".