12002401 has 4 divisors (see below), whose sum is σ = 12010900. Its totient is φ = 11993904.

The previous prime is 12002387. The next prime is 12002407. The reversal of 12002401 is 10420021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10420021 = 79 ⋅131899.

It can be written as a sum of positive squares in 2 ways, for example, as 9928801 + 2073600 = 3151^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002401 - 2⁵ = 12002369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12002407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1566 + ... + 5143.

It is an arithmetic number, because the mean of its divisors is an integer number (3002725).

Almost surely, 2^12002401 is an apocalyptic number.

It is an amenable number.

12002401 is a deficient number, since it is larger than the sum of its proper divisors (8499).

12002401 is an equidigital number, since it uses as much as digits as its factorization.

12002401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8498.

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

The square root of 12002401 is about 3464.4481523036. The cubic root of 12002401 is about 228.9581167085.

Adding to 12002401 its reverse (10420021), we get a palindrome (22422422).

It can be divided in two parts, 12002 and 401, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 12002401 in words is "twelve million, two thousand, four hundred one".