401420321 has 4 divisors (see below), whose sum is σ = 408001044. Its totient is φ = 394839600.

The previous prime is 401420317. The next prime is 401420329. The reversal of 401420321 is 123024104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46512400 + 354907921 = 6820^2 + 18839^2 .

It is a cyclic number.

It is not a de Polignac number, because 401420321 - 2² = 401420317 is a prime.

It is a super-2 number, since 2×401420321² = 322276548223486082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401420321.

It is not an unprimeable number, because it can be changed into a prime (401420329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3290270 + ... + 3290391.

It is an arithmetic number, because the mean of its divisors is an integer number (102000261).

Almost surely, 2^401420321 is an apocalyptic number.

It is an amenable number.

401420321 is a deficient number, since it is larger than the sum of its proper divisors (6580723).

401420321 is an equidigital number, since it uses as much as digits as its factorization.

401420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6580722.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 401420321 is about 20035.4765603417. The cubic root of 401420321 is about 737.6773541098.

Adding to 401420321 its reverse (123024104), we get a palindrome (524444425).

The spelling of 401420321 in words is "four hundred one million, four hundred twenty thousand, three hundred twenty-one".