40002401 has 4 divisors (see below), whose sum is σ = 40147092. Its totient is φ = 39857712.

The previous prime is 40002379. The next prime is 40002421. The reversal of 40002401 is 10420004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3701776 + 36300625 = 1924^2 + 6025^2 .

It is a cyclic number.

It is not a de Polignac number, because 40002401 - 2⁶ = 40002337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40002421) 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, 71930 + ... + 72483.

It is an arithmetic number, because the mean of its divisors is an integer number (10036773).

Almost surely, 2^40002401 is an apocalyptic number.

It is an amenable number.

40002401 is a deficient number, since it is larger than the sum of its proper divisors (144691).

40002401 is a wasteful number, since it uses less digits than its factorization.

40002401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144690.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 40002401 is about 6324.7451332050. The cubic root of 40002401 is about 342.0020319522.

Adding to 40002401 its reverse (10420004), we get a palindrome (50422405).

The spelling of 40002401 in words is "forty million, two thousand, four hundred one".