12440401 has 8 divisors (see below), whose sum is σ = 13195584. Its totient is φ = 11703120.

The previous prime is 12440381. The next prime is 12440411. The reversal of 12440401 is 10404421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12440401 - 2⁵ = 12440369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12440411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3031 + ... + 5836.

It is an arithmetic number, because the mean of its divisors is an integer number (1649448).

Almost surely, 2^12440401 is an apocalyptic number.

It is an amenable number.

12440401 is a deficient number, since it is larger than the sum of its proper divisors (755183).

12440401 is an equidigital number, since it uses as much as digits as its factorization.

12440401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8951.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12440401 is about 3527.0952638113. The cubic root of 12440401 is about 231.7100085106.

Adding to 12440401 its reverse (10404421), we get a palindrome (22844822).

The spelling of 12440401 in words is "twelve million, four hundred forty thousand, four hundred one".