405275 has 24 divisors (see below), whose sum is σ = 572880. Its totient is φ = 282240.

The previous prime is 405269. The next prime is 405277. The reversal of 405275 is 572504.

It is not a de Polignac number, because 405275 - 2⁶ = 405211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405275.

It is not an unprimeable number, because it can be changed into a prime (405277) 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 23 ways as a sum of consecutive naturals, for example, 9404 + ... + 9446.

It is an arithmetic number, because the mean of its divisors is an integer number (23870).

2⁴⁰⁵²⁷⁵ is an apocalyptic number.

405275 is a deficient number, since it is larger than the sum of its proper divisors (167605).

405275 is a wasteful number, since it uses less digits than its factorization.

405275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 405275 is about 636.6121268088. The cubic root of 405275 is about 74.0031043256.

Adding to 405275 its reverse (572504), we get a palindrome (977779).

The spelling of 405275 in words is "four hundred five thousand, two hundred seventy-five".