401243321 has 4 divisors (see below), whose sum is σ = 402434292. Its totient is φ = 400052352.

The previous prime is 401243309. The next prime is 401243327. The reversal of 401243321 is 123342104.

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 277588921 + 123654400 = 16661^2 + 11120^2 .

It is a cyclic number.

It is not a de Polignac number, because 401243321 - 2²² = 397049017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401243293 and 401243302.

It is not an unprimeable number, because it can be changed into a prime (401243327) 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 3 ways as a sum of consecutive naturals, for example, 594980 + ... + 595653.

It is an arithmetic number, because the mean of its divisors is an integer number (100608573).

Almost surely, 2^401243321 is an apocalyptic number.

It is an amenable number.

401243321 is a deficient number, since it is larger than the sum of its proper divisors (1190971).

401243321 is a wasteful number, since it uses less digits than its factorization.

401243321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190970.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 401243321 is about 20031.0589086049. The cubic root of 401243321 is about 737.5689157471.

Adding to 401243321 its reverse (123342104), we get a palindrome (524585425).

The spelling of 401243321 in words is "four hundred one million, two hundred forty-three thousand, three hundred twenty-one".