12401001 has 12 divisors (see below), whose sum is σ = 17945200. Its totient is φ = 8252280.

The previous prime is 12400987. The next prime is 12401027. The reversal of 12401001 is 10010421.

It is a happy number.

It is not a de Polignac number, because 12401001 - 2⁹ = 12400489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12401101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6450 + ... + 8148.

Almost surely, 2^12401001 is an apocalyptic number.

It is an amenable number.

12401001 is a deficient number, since it is larger than the sum of its proper divisors (5544199).

12401001 is a wasteful number, since it uses less digits than its factorization.

12401001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2516 (or 2513 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 12401001 is about 3521.5055019125. The cubic root of 12401001 is about 231.4651335206.

Adding to 12401001 its reverse (10010421), we get a palindrome (22411422).

The spelling of 12401001 in words is "twelve million, four hundred one thousand, one".