401641 has 4 divisors (see below), whose sum is σ = 422800. Its totient is φ = 380484.

The previous prime is 401629. The next prime is 401651. The reversal of 401641 is 146104.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401641 - 2¹⁵ = 368873 is a prime.

It is a super-2 number, since 2×401641² = 322630985762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10551 + ... + 10588.

It is an arithmetic number, because the mean of its divisors is an integer number (105700).

2⁴⁰¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

401641 is a deficient number, since it is larger than the sum of its proper divisors (21159).

401641 is a wasteful number, since it uses less digits than its factorization.

401641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21158.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 401641 is about 633.7515285978. The cubic root of 401641 is about 73.7812507606.

Adding to 401641 its reverse (146104), we get a palindrome (547745).

It can be divided in two parts, 40 and 1641, that added together give a square (1681 = 41²).

The spelling of 401641 in words is "four hundred one thousand, six hundred forty-one".