405402 has 8 divisors (see below), whose sum is σ = 810816. Its totient is φ = 135132.

The previous prime is 405401. The next prime is 405407. The reversal of 405402 is 204504.

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

405402 is an admirable number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (405401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33778 + ... + 33789.

It is an arithmetic number, because the mean of its divisors is an integer number (101352).

2⁴⁰⁵⁴⁰² is an apocalyptic number.

405402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405402 is a wasteful number, since it uses less digits than its factorization.

405402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67572.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 405402 is about 636.7118657603. The cubic root of 405402 is about 74.0108335734.

Adding to 405402 its reverse (204504), we get a palindrome (609906).

The spelling of 405402 in words is "four hundred five thousand, four hundred two".