12240001 has 4 divisors (see below), whose sum is σ = 12662100. Its totient is φ = 11817904.

The previous prime is 12239999. The next prime is 12240013. The reversal of 12240001 is 10004221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10004221 = 2089 ⋅4789.

It can be written as a sum of positive squares in 2 ways, for example, as 2480625 + 9759376 = 1575^2 + 3124^2 .

It is a cyclic number.

It is not a de Polignac number, because 12240001 - 2¹ = 12239999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12240001.

It is not an unprimeable number, because it can be changed into a prime (12240061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211006 + ... + 211063.

It is an arithmetic number, because the mean of its divisors is an integer number (3165525).

Almost surely, 2^12240001 is an apocalyptic number.

It is an amenable number.

12240001 is a deficient number, since it is larger than the sum of its proper divisors (422099).

12240001 is an equidigital number, since it uses as much as digits as its factorization.

12240001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422098.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12240001 is about 3498.5712798227. The cubic root of 12240001 is about 230.4590767783.

Adding to 12240001 its reverse (10004221), we get a palindrome (22244222).

The spelling of 12240001 in words is "twelve million, two hundred forty thousand, one".