42091530 has 32 divisors (see below), whose sum is σ = 108791424. Its totient is φ = 10360896.

The previous prime is 42091529. The next prime is 42091531. The reversal of 42091530 is 3519024.

It is an interprime number because it is at equal distance from previous prime (42091529) and next prime (42091531).

It is a self number, because there is not a number n which added to its sum of digits gives 42091530.

It is not an unprimeable number, because it can be changed into a prime (42091531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53574 + ... + 54353.

It is an arithmetic number, because the mean of its divisors is an integer number (3399732).

Almost surely, 2^42091530 is an apocalyptic number.

42091530 is an abundant number, since it is smaller than the sum of its proper divisors (66699894).

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

42091530 is a wasteful number, since it uses less digits than its factorization.

42091530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107950.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 42091530 is about 6487.7985480439. The cubic root of 42091530 is about 347.8549897880.

The spelling of 42091530 in words is "forty-two million, ninety-one thousand, five hundred thirty".