401320421 has 8 divisors (see below), whose sum is σ = 403557504. Its totient is φ = 399090240.

The previous prime is 401320393. The next prime is 401320427. The reversal of 401320421 is 124023104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401320421 - 2¹⁴ = 401304037 is a prime.

It is a super-2 number, since 2×401320421² = 322116160623234482, 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 401320421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401320427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148916 + ... + 151586.

It is an arithmetic number, because the mean of its divisors is an integer number (50444688).

Almost surely, 2^401320421 is an apocalyptic number.

It is an amenable number.

401320421 is a deficient number, since it is larger than the sum of its proper divisors (2237083).

401320421 is a wasteful number, since it uses less digits than its factorization.

401320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451.

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

The square root of 401320421 is about 20032.9833275027. The cubic root of 401320421 is about 737.6161546820.

Adding to 401320421 its reverse (124023104), we get a palindrome (525343525).

The spelling of 401320421 in words is "four hundred one million, three hundred twenty thousand, four hundred twenty-one".