401020 has 12 divisors (see below), whose sum is σ = 842184. Its totient is φ = 160400.

The previous prime is 401017. The next prime is 401029. The reversal of 401020 is 20104.

401020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 400994 and 401012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401029) 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 3 ways as a sum of consecutive naturals, for example, 10006 + ... + 10045.

It is an arithmetic number, because the mean of its divisors is an integer number (70182).

2⁴⁰¹⁰²⁰ is an apocalyptic number.

It is an amenable number.

401020 is an abundant number, since it is smaller than the sum of its proper divisors (441164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401020 is a wasteful number, since it uses less digits than its factorization.

401020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20060 (or 20058 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 401020 is about 633.2613994237. The cubic root of 401020 is about 73.7432053493.

Adding to 401020 its reverse (20104), we get a palindrome (421124).

It can be divided in two parts, 4010 and 20, that multiplied together give a triangular number (80200 = T₄₀₀).

The spelling of 401020 in words is "four hundred one thousand, twenty", and thus it is an iban number.