401001 has 8 divisors (see below), whose sum is σ = 537600.
Its totient is φ = 265872.
The previous prime is 400997. The next prime is 401017. The reversal of 401001 is 100104.
Adding to 401001 its reverse (100104), we get a palindrome (501105).
401001 is nontrivially palindromic in base 5.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 401001 - 22 = 400997 is a prime.
401001 is a lucky number.
It is not an unprimeable number, because it can be changed into a prime (401101) 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, 856 + ... + 1238.
It is an arithmetic number, because the mean of its divisors is an integer number (67200).
2401001 is an apocalyptic number.
401001 is the 401-st centered pentagonal number.
It is an amenable number.
401001 is a deficient number, since it is larger than the sum of its proper divisors (136599).
401001 is a wasteful number, since it uses less digits than its factorization.
401001 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 735.
The product of its (nonzero) digits is 4, while the sum is 6.
The square root of 401001 is about 633.2463975421.
The cubic root of 401001 is about 73.7420407000.
The spelling of 401001 in words is "four hundred one thousand, one", and thus it is an iban number.