401111 has 4 divisors (see below), whose sum is σ = 403224. Its totient is φ = 399000.

The previous prime is 401101. The next prime is 401113. The reversal of 401111 is 111104.

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

It is a cyclic number.

It is not a de Polignac number, because 401111 - 2¹⁰ = 400087 is a prime.

It is a Duffinian number.

401111 is a modest number, since divided by 1111 gives 40 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401113) 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, 740 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (100806).

2⁴⁰¹¹¹¹ is an apocalyptic number.

401111 is a deficient number, since it is larger than the sum of its proper divisors (2113).

401111 is a wasteful number, since it uses less digits than its factorization.

401111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 401111 is about 633.3332456140. Note that the first 3 decimals coincide. The cubic root of 401111 is about 73.7487828967.

Adding to 401111 its reverse (111104), we get a palindrome (512215).

It can be divided in two parts, 401 and 111, that added together give a 9-th power (512 = 2⁹).

The spelling of 401111 in words is "four hundred one thousand, one hundred eleven", and thus it is an iban number.