401343421 has 4 divisors (see below), whose sum is σ = 401449500. Its totient is φ = 401237344.

The previous prime is 401343377. The next prime is 401343443. The reversal of 401343421 is 124343104.

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 45077796 + 356265625 = 6714^2 + 18875^2 .

It is a cyclic number.

It is not a de Polignac number, because 401343421 - 2²¹ = 399246269 is a prime.

It is a super-2 number, since 2×401343421² = 322153083159966482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401343392 and 401343401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401343451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47146 + ... + 55003.

It is an arithmetic number, because the mean of its divisors is an integer number (100362375).

Almost surely, 2^401343421 is an apocalyptic number.

It is an amenable number.

401343421 is a deficient number, since it is larger than the sum of its proper divisors (106079).

401343421 is a wasteful number, since it uses less digits than its factorization.

401343421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106078.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 401343421 is about 20033.5573725687. The cubic root of 401343421 is about 737.6302455403.

Adding to 401343421 its reverse (124343104), we get a palindrome (525686525).

The spelling of 401343421 in words is "four hundred one million, three hundred forty-three thousand, four hundred twenty-one".