406542 has 8 divisors (see below), whose sum is σ = 813096. Its totient is φ = 135512.

The previous prime is 406531. The next prime is 406547. The reversal of 406542 is 245604.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

406542 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 406542.

It is not an unprimeable number, because it can be changed into a prime (406547) by changing a digit.

406542 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 in 3 ways as a sum of consecutive naturals, for example, 33873 + ... + 33884.

It is an arithmetic number, because the mean of its divisors is an integer number (101637).

2⁴⁰⁶⁵⁴² is an apocalyptic number.

406542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406542 is a wasteful number, since it uses less digits than its factorization.

406542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67762.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 406542 is about 637.6064616988. The cubic root of 406542 is about 74.0801420523.

The spelling of 406542 in words is "four hundred six thousand, five hundred forty-two".