405002001 has 8 divisors (see below), whose sum is σ = 541635424. Its totient is φ = 269184960.

The previous prime is 405001981. The next prime is 405002047. The reversal of 405002001 is 100200504.

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

It is not a de Polignac number, because 405002001 - 2⁵ = 405001969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405002501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202936 + ... + 204921.

It is an arithmetic number, because the mean of its divisors is an integer number (67704428).

Almost surely, 2^405002001 is an apocalyptic number.

It is an amenable number.

405002001 is a deficient number, since it is larger than the sum of its proper divisors (136633423).

405002001 is a wasteful number, since it uses less digits than its factorization.

405002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408191.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 405002001 is about 20124.6615126814. The cubic root of 405002001 is about 739.8648407886.

Adding to 405002001 its reverse (100200504), we get a palindrome (505202505).

The spelling of 405002001 in words is "four hundred five million, two thousand, one".