409242 has 8 divisors (see below), whose sum is σ = 818496. Its totient is φ = 136412.

The previous prime is 409237. The next prime is 409259. The reversal of 409242 is 242904.

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

409242 is an admirable number.

It is an unprimeable number.

409242 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 34098 + ... + 34109.

It is an arithmetic number, because the mean of its divisors is an integer number (102312).

2⁴⁰⁹²⁴² is an apocalyptic number.

409242 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.

409242 is a wasteful number, since it uses less digits than its factorization.

409242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68212.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 409242 is about 639.7202513599. The cubic root of 409242 is about 74.2437784582.

The spelling of 409242 in words is "four hundred nine thousand, two hundred forty-two".