12440001 has 16 divisors (see below), whose sum is σ = 19315584. Its totient is φ = 6973824.

The previous prime is 12439979. The next prime is 12440009. The reversal of 12440001 is 10004421.

It is not a de Polignac number, because 12440001 - 2⁵ = 12439969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12440009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4476 + ... + 6701.

It is an arithmetic number, because the mean of its divisors is an integer number (1207224).

Almost surely, 2^12440001 is an apocalyptic number.

It is an amenable number.

12440001 is a deficient number, since it is larger than the sum of its proper divisors (6875583).

12440001 is a wasteful number, since it uses less digits than its factorization.

12440001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11240.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 12440001 is about 3527.0385594717. The cubic root of 12440001 is about 231.7075250698.

Adding to 12440001 its reverse (10004421), we get a palindrome (22444422).

The spelling of 12440001 in words is "twelve million, four hundred forty thousand, one".