401321020 has 24 divisors (see below), whose sum is σ = 879417504. Its totient is φ = 153548736.

The previous prime is 401321017. The next prime is 401321029. The reversal of 401321020 is 20123104.

It is a super-2 number, since 2×401321020² = 322117122187680800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401321029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435759 + ... + 436678.

It is an arithmetic number, because the mean of its divisors is an integer number (36642396).

Almost surely, 2^401321020 is an apocalyptic number.

It is an amenable number.

401321020 is an abundant number, since it is smaller than the sum of its proper divisors (478096484).

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

401321020 is a wasteful number, since it uses less digits than its factorization.

401321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872469 (or 872467 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 401321020 is about 20032.9982778415. The cubic root of 401321020 is about 737.6165216638.

Adding to 401321020 its reverse (20123104), we get a palindrome (421444124).

The spelling of 401321020 in words is "four hundred one million, three hundred twenty-one thousand, twenty".