401611 has 4 divisors (see below), whose sum is σ = 458992. Its totient is φ = 344232.

The previous prime is 401593. The next prime is 401627. The reversal of 401611 is 116104.

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

It is not a de Polignac number, because 401611 - 2¹⁷ = 270539 is a prime.

It is a super-2 number, since 2×401611² = 322582790642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401591 and 401600.

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, 28680 + ... + 28693.

It is an arithmetic number, because the mean of its divisors is an integer number (114748).

2⁴⁰¹⁶¹¹ is an apocalyptic number.

401611 is a deficient number, since it is larger than the sum of its proper divisors (57381).

401611 is an equidigital number, since it uses as much as digits as its factorization.

401611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57380.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 401611 is about 633.7278595738. The cubic root of 401611 is about 73.7794137198.

Adding to 401611 its reverse (116104), we get a palindrome (517715).

The spelling of 401611 in words is "four hundred one thousand, six hundred eleven".