405706 has 8 divisors (see below), whose sum is σ = 695520. Its totient is φ = 173868.

The previous prime is 405703. The next prime is 405709. The reversal of 405706 is 607504.

It is an interprime number because it is at equal distance from previous prime (405703) and next prime (405709).

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

It is not an unprimeable number, because it can be changed into a prime (405701) 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, 14476 + ... + 14503.

It is an arithmetic number, because the mean of its divisors is an integer number (86940).

2⁴⁰⁵⁷⁰⁶ is an apocalyptic number.

405706 is a deficient number, since it is larger than the sum of its proper divisors (289814).

405706 is a wasteful number, since it uses less digits than its factorization.

405706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28988.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 405706 is about 636.9505475310. The cubic root of 405706 is about 74.0293285256.

It can be divided in two parts, 405 and 706, that added together give a palindrome (1111).

The spelling of 405706 in words is "four hundred five thousand, seven hundred six".