406451 has 6 divisors (see below), whose sum is σ = 418380. Its totient is φ = 394748.

The previous prime is 406447. The next prime is 406481. The reversal of 406451 is 154604.

It is a happy number.

It is not a de Polignac number, because 406451 - 2² = 406447 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 406451.

It is not an unprimeable number, because it can be changed into a prime (406481) 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 5 ways as a sum of consecutive naturals, for example, 4856 + ... + 4938.

It is an arithmetic number, because the mean of its divisors is an integer number (69730).

2⁴⁰⁶⁴⁵¹ is an apocalyptic number.

406451 is a deficient number, since it is larger than the sum of its proper divisors (11929).

406451 is an frugal number, since it uses more digits than its factorization.

406451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 406451 is about 637.5350970731. The cubic root of 406451 is about 74.0746142954.

The spelling of 406451 in words is "four hundred six thousand, four hundred fifty-one".