408742 has 4 divisors (see below), whose sum is σ = 613116. Its totient is φ = 204370.

The previous prime is 408719. The next prime is 408743. The reversal of 408742 is 247804.

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 (408743) by changing a digit.

408742 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, 102184 + ... + 102187.

It is an arithmetic number, because the mean of its divisors is an integer number (153279).

2⁴⁰⁸⁷⁴² is an apocalyptic number.

408742 is a deficient number, since it is larger than the sum of its proper divisors (204374).

408742 is a wasteful number, since it uses less digits than its factorization.

408742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204373.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 408742 is about 639.3293361015. The cubic root of 408742 is about 74.2135298378.

The spelling of 408742 in words is "four hundred eight thousand, seven hundred forty-two".