406765 has 4 divisors (see below), whose sum is σ = 488124. Its totient is φ = 325408.

The previous prime is 406739. The next prime is 406789. The reversal of 406765 is 567604.

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

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 170569 = 486^2 + 413^2 .

It is a cyclic number.

It is not a de Polignac number, because 406765 - 2⁹ = 406253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 40672 + ... + 40681.

It is an arithmetic number, because the mean of its divisors is an integer number (122031).

2⁴⁰⁶⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

406765 is a deficient number, since it is larger than the sum of its proper divisors (81359).

406765 is an equidigital number, since it uses as much as digits as its factorization.

406765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81358.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 406765 is about 637.7813104819. The cubic root of 406765 is about 74.0936846072.

The spelling of 406765 in words is "four hundred six thousand, seven hundred sixty-five".