406457 has 4 divisors (see below), whose sum is σ = 414180. Its totient is φ = 398736.

The previous prime is 406447. The next prime is 406481. The reversal of 406457 is 754604.

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 346921 + 59536 = 589^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 406457 - 2¹² = 402361 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406457.

It is not an unprimeable number, because it can be changed into a prime (406447) 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 in 3 ways as a sum of consecutive naturals, for example, 3782 + ... + 3887.

It is an arithmetic number, because the mean of its divisors is an integer number (103545).

2⁴⁰⁶⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

406457 is a deficient number, since it is larger than the sum of its proper divisors (7723).

406457 is an equidigital number, since it uses as much as digits as its factorization.

406457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 406457 is about 637.5398026790. The cubic root of 406457 is about 74.0749787883.

The spelling of 406457 in words is "four hundred six thousand, four hundred fifty-seven".