405452 has 6 divisors (see below), whose sum is σ = 709548. Its totient is φ = 202724.

The previous prime is 405439. The next prime is 405473. The reversal of 405452 is 254504.

It is a happy number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 50678 + ... + 50685.

It is an arithmetic number, because the mean of its divisors is an integer number (118258).

2⁴⁰⁵⁴⁵² is an apocalyptic number.

It is an amenable number.

405452 is a deficient number, since it is larger than the sum of its proper divisors (304096).

405452 is a wasteful number, since it uses less digits than its factorization.

405452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101367 (or 101365 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 405452 is about 636.7511287780. The cubic root of 405452 is about 74.0138761415.

Adding to 405452 its reverse (254504), we get a palindrome (659956).

The spelling of 405452 in words is "four hundred five thousand, four hundred fifty-two".