42091730 has 16 divisors (see below), whose sum is σ = 75902400. Its totient is φ = 16806192.

The previous prime is 42091729. The next prime is 42091747. The reversal of 42091730 is 3719024.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42091730.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2477 + ... + 9503.

It is an arithmetic number, because the mean of its divisors is an integer number (4743900).

Almost surely, 2^42091730 is an apocalyptic number.

42091730 is a deficient number, since it is larger than the sum of its proper divisors (33810670).

42091730 is a wasteful number, since it uses less digits than its factorization.

42091730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7633.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 42091730 is about 6487.8139615744. The cubic root of 42091730 is about 347.8555407372.

The spelling of 42091730 in words is "forty-two million, ninety-one thousand, seven hundred thirty".