12231505 has 16 divisors (see below), whose sum is σ = 17244864. Its totient is φ = 8210880.

The previous prime is 12231503. The next prime is 12231509. The reversal of 12231505 is 50513221.

12231505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12231505 - 2¹ = 12231503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12231503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7839 + ... + 9268.

It is an arithmetic number, because the mean of its divisors is an integer number (1077804).

Almost surely, 2^12231505 is an apocalyptic number.

It is an amenable number.

12231505 is a deficient number, since it is larger than the sum of its proper divisors (5013359).

12231505 is a wasteful number, since it uses less digits than its factorization.

12231505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17136.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 12231505 is about 3497.3568591152. The cubic root of 12231505 is about 230.4057425367.

Adding to 12231505 its reverse (50513221), we get a palindrome (62744726).

The spelling of 12231505 in words is "twelve million, two hundred thirty-one thousand, five hundred five".