12442215 has 32 divisors (see below), whose sum is σ = 21461760. Its totient is φ = 6132224.

The previous prime is 12442201. The next prime is 12442217. The reversal of 12442215 is 51224421.

It is not a de Polignac number, because 12442215 - 2⁶ = 12442151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12442191 and 12442200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12442217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14632 + ... + 15458.

It is an arithmetic number, because the mean of its divisors is an integer number (670680).

Almost surely, 2^12442215 is an apocalyptic number.

12442215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12442215 is a deficient number, since it is larger than the sum of its proper divisors (9019545).

12442215 is a wasteful number, since it uses less digits than its factorization.

12442215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911.

The product of its digits is 640, while the sum is 21.

The square root of 12442215 is about 3527.3524065508. The cubic root of 12442215 is about 231.7212702464.

Adding to 12442215 its reverse (51224421), we get a palindrome (63666636).

The spelling of 12442215 in words is "twelve million, four hundred forty-two thousand, two hundred fifteen".