401205001 has 4 divisors (see below), whose sum is σ = 402158404. Its totient is φ = 400251600.

The previous prime is 401204989. The next prime is 401205011. The reversal of 401205001 is 100502104.

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 71419401 + 329785600 = 8451^2 + 18160^2 .

It is a cyclic number.

It is not a de Polignac number, because 401205001 - 2¹¹ = 401202953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401205011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476070 + ... + 476911.

It is an arithmetic number, because the mean of its divisors is an integer number (100539601).

Almost surely, 2^401205001 is an apocalyptic number.

It is an amenable number.

401205001 is a deficient number, since it is larger than the sum of its proper divisors (953403).

401205001 is an equidigital number, since it uses as much as digits as its factorization.

401205001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953402.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 401205001 is about 20030.1023711812. The cubic root of 401205001 is about 737.5454349486.

Adding to 401205001 its reverse (100502104), we get a palindrome (501707105).

The spelling of 401205001 in words is "four hundred one million, two hundred five thousand, one".