401791 has 8 divisors (see below), whose sum is σ = 447104. Its totient is φ = 358560.

The previous prime is 401773. The next prime is 401809. The reversal of 401791 is 197104.

It is an interprime number because it is at equal distance from previous prime (401773) and next prime (401809).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401791 - 2⁹ = 401279 is a prime.

It is a super-2 number, since 2×401791² = 322872015362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 901.

It is an arithmetic number, because the mean of its divisors is an integer number (55888).

2⁴⁰¹⁷⁹¹ is an apocalyptic number.

401791 is a deficient number, since it is larger than the sum of its proper divisors (45313).

401791 is a wasteful number, since it uses less digits than its factorization.

401791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 401791 is about 633.8698604603. The cubic root of 401791 is about 73.7904345923.

Adding to 401791 its reverse (197104), we get a palindrome (598895).

The spelling of 401791 in words is "four hundred one thousand, seven hundred ninety-one".