405226 has 4 divisors (see below), whose sum is σ = 607842. Its totient is φ = 202612.

The previous prime is 405221. The next prime is 405227. The reversal of 405226 is 622504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 342225 + 63001 = 585^2 + 251^2 .

It is a super-2 number, since 2×405226² = 328416222152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (405221) 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 as a sum of consecutive naturals, namely, 101305 + ... + 101308.

2⁴⁰⁵²²⁶ is an apocalyptic number.

405226 is a deficient number, since it is larger than the sum of its proper divisors (202616).

405226 is a wasteful number, since it uses less digits than its factorization.

405226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202615.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 405226 is about 636.5736406733. The cubic root of 405226 is about 74.0001217432. Note that the first 3 decimals are identical.

The spelling of 405226 in words is "four hundred five thousand, two hundred twenty-six".