406558 has 4 divisors (see below), whose sum is σ = 609840. Its totient is φ = 203278.

The previous prime is 406547. The next prime is 406559. The reversal of 406558 is 855604.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406559) by changing a digit.

406558 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101638 + ... + 101641.

It is an arithmetic number, because the mean of its divisors is an integer number (152460).

2⁴⁰⁶⁵⁵⁸ is an apocalyptic number.

406558 is a deficient number, since it is larger than the sum of its proper divisors (203282).

406558 is a wasteful number, since it uses less digits than its factorization.

406558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203281.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 406558 is about 637.6190084996. The cubic root of 406558 is about 74.0811138803.

The spelling of 406558 in words is "four hundred six thousand, five hundred fifty-eight".