402401 has 4 divisors (see below), whose sum is σ = 423600. Its totient is φ = 381204.

The previous prime is 402383. The next prime is 402403. The reversal of 402401 is 104204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 402401 - 2¹⁴ = 386017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (402403) 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, 10571 + ... + 10608.

It is an arithmetic number, because the mean of its divisors is an integer number (105900).

2⁴⁰²⁴⁰¹ is an apocalyptic number.

It is an amenable number.

402401 is a deficient number, since it is larger than the sum of its proper divisors (21199).

402401 is a wasteful number, since it uses less digits than its factorization.

402401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21198.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 402401 is about 634.3508492940. The cubic root of 402401 is about 73.8277586448.

Adding to 402401 its reverse (104204), we get a palindrome (506605).

The spelling of 402401 in words is "four hundred two thousand, four hundred one", and thus it is an iban number.