405026 has 8 divisors (see below), whose sum is σ = 619164. Its totient is φ = 198640.

The previous prime is 405011. The next prime is 405029. The reversal of 405026 is 620504.

It can be written as a sum of positive squares in 2 ways, for example, as 358801 + 46225 = 599^2 + 215^2 .

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

It is a super-4 number, since 4×405026⁴ (a number of 24 digits) contains 4444 as substring.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 404995 and 405013.

It is not an unprimeable number, because it can be changed into a prime (405029) by changing a digit.

405026 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1805 + ... + 2016.

2⁴⁰⁵⁰²⁶ is an apocalyptic number.

405026 is a deficient number, since it is larger than the sum of its proper divisors (214138).

405026 is a wasteful number, since it uses less digits than its factorization.

405026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3876.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 405026 is about 636.4165302693. The cubic root of 405026 is about 73.9879454433.

The spelling of 405026 in words is "four hundred five thousand, twenty-six".