406427 has 4 divisors (see below), whose sum is σ = 464496. Its totient is φ = 348360.

The previous prime is 406423. The next prime is 406447. The reversal of 406427 is 724604.

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

It is a cyclic number.

It is not a de Polignac number, because 406427 - 2² = 406423 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 406427.

It is not an unprimeable number, because it can be changed into a prime (406423) 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, 29024 + ... + 29037.

It is an arithmetic number, because the mean of its divisors is an integer number (116124).

2⁴⁰⁶⁴²⁷ is an apocalyptic number.

406427 is a deficient number, since it is larger than the sum of its proper divisors (58069).

406427 is an equidigital number, since it uses as much as digits as its factorization.

406427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58068.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 406427 is about 637.5162743021. The cubic root of 406427 is about 74.0731562880.

The spelling of 406427 in words is "four hundred six thousand, four hundred twenty-seven".