401421 has 12 divisors (see below), whose sum is σ = 569792. Its totient is φ = 251328.

The previous prime is 401417. The next prime is 401473. The reversal of 401421 is 124104.

It is not a de Polignac number, because 401421 - 2² = 401417 is a prime.

It is a super-2 number, since 2×401421² = 322277638482, 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 = 401397 and 401406.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 401421.

It is not an unprimeable number, because it can be changed into a prime (401411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 636 + ... + 1098.

2⁴⁰¹⁴²¹ is an apocalyptic number.

It is an amenable number.

401421 is a deficient number, since it is larger than the sum of its proper divisors (168371).

401421 is a wasteful number, since it uses less digits than its factorization.

401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 401421 is about 633.5779352219. The cubic root of 401421 is about 73.7677770035.

Adding to 401421 its reverse (124104), we get a palindrome (525525).

The spelling of 401421 in words is "four hundred one thousand, four hundred twenty-one", and thus it is an iban number.