305742 has 8 divisors (see below), whose sum is σ = 611496. Its totient is φ = 101912.

The previous prime is 305741. The next prime is 305743. The reversal of 305742 is 247503.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (305741) and next prime (305743).

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

305742 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25473 + ... + 25484.

It is an arithmetic number, because the mean of its divisors is an integer number (76437).

2³⁰⁵⁷⁴² is an apocalyptic number.

305742 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.

305742 is a wasteful number, since it uses less digits than its factorization.

305742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50962.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 305742 is about 552.9394180197. The cubic root of 305742 is about 67.3676969537.

The spelling of 305742 in words is "three hundred five thousand, seven hundred forty-two".