405259 has 4 divisors (see below), whose sum is σ = 407680.
Its totient is φ = 402840.
The previous prime is 405253. The next prime is 405269. The reversal of 405259 is 952504.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 405259 - 25 = 405227 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (405253) 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, 939 + ... + 1300.
It is an arithmetic number, because the mean of its divisors is an integer number (101920).
2405259 is an apocalyptic number.
405259 is a deficient number, since it is larger than the sum of its proper divisors (2421).
405259 is a wasteful number, since it uses less digits than its factorization.
405259 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2420.
The product of its (nonzero) digits is 1800, while the sum is 25.
The square root of 405259 is about 636.5995601632.
The cubic root of 405259 is about 74.0021304476.
The spelling of 405259 in words is "four hundred five thousand, two hundred fifty-nine".