401835 has 32 divisors (see below), whose sum is σ = 760320. Its totient is φ = 177408.

The previous prime is 401827. The next prime is 401839. The reversal of 401835 is 538104.

It is not a de Polignac number, because 401835 - 2³ = 401827 is a prime.

It is a super-2 number, since 2×401835² = 322942734450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (401839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4471 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (23760).

2⁴⁰¹⁸³⁵ is an apocalyptic number.

401835 is a deficient number, since it is larger than the sum of its proper divisors (358485).

401835 is a wasteful number, since it uses less digits than its factorization.

401835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 401835 is about 633.9045669499. The cubic root of 401835 is about 73.7931280828.

Adding to 401835 its sum of digits (21), we get a triangular number (401856 = T₈₉₆).

Adding to 401835 its reverse (538104), we get a palindrome (939939).

The spelling of 401835 in words is "four hundred one thousand, eight hundred thirty-five".