401155 has 4 divisors (see below), whose sum is σ = 481392. Its totient is φ = 320920.

The previous prime is 401119. The next prime is 401161. The reversal of 401155 is 551104.

It is a happy number.

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

It is not a de Polignac number, because 401155 - 2⁹ = 400643 is a prime.

It is a Duffinian number.

401155 is a lucky number.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40111 + ... + 40120.

It is an arithmetic number, because the mean of its divisors is an integer number (120348).

2⁴⁰¹¹⁵⁵ is an apocalyptic number.

401155 is a deficient number, since it is larger than the sum of its proper divisors (80237).

401155 is an equidigital number, since it uses as much as digits as its factorization.

401155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80236.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 401155 is about 633.3679815084. The cubic root of 401155 is about 73.7514794302.

Adding to 401155 its reverse (551104), we get a palindrome (952259).

The spelling of 401155 in words is "four hundred one thousand, one hundred fifty-five".