401943 has 4 divisors (see below), whose sum is σ = 535928. Its totient is φ = 267960.

The previous prime is 401939. The next prime is 401953. The reversal of 401943 is 349104.

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

It is not a de Polignac number, because 401943 - 2² = 401939 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401903) 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, 66988 + ... + 66993.

It is an arithmetic number, because the mean of its divisors is an integer number (133982).

2⁴⁰¹⁹⁴³ is an apocalyptic number.

401943 is a deficient number, since it is larger than the sum of its proper divisors (133985).

401943 is a wasteful number, since it uses less digits than its factorization.

401943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133984.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 401943 is about 633.9897475512. The cubic root of 401943 is about 73.7997385439.

The spelling of 401943 in words is "four hundred one thousand, nine hundred forty-three".