401205020 has 24 divisors (see below), whose sum is σ = 850264800. Its totient is φ = 159008832.

The previous prime is 401205017. The next prime is 401205041. The reversal of 401205020 is 20502104.

It is a junction number, because it is equal to n+sod(n) for n = 401204986 and 401205004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89840 + ... + 94199.

It is an arithmetic number, because the mean of its divisors is an integer number (35427700).

Almost surely, 2^401205020 is an apocalyptic number.

It is an amenable number.

401205020 is an abundant number, since it is smaller than the sum of its proper divisors (449059780).

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

401205020 is a wasteful number, since it uses less digits than its factorization.

401205020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184157 (or 184155 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 401205020 is about 20030.1028454674. The cubic root of 401205020 is about 737.5454465913.

Adding to 401205020 its reverse (20502104), we get a palindrome (421707124).

The spelling of 401205020 in words is "four hundred one million, two hundred five thousand, twenty".