42517790 has 24 divisors (see below), whose sum is σ = 89028072. Its totient is φ = 14577360.

The previous prime is 42517789. The next prime is 42517807. The reversal of 42517790 is 9771524.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 42517790.

It is a congruent number.

It is an unprimeable 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 11 ways as a sum of consecutive naturals, for example, 42896 + ... + 43875.

It is an arithmetic number, because the mean of its divisors is an integer number (3709503).

Almost surely, 2^42517790 is an apocalyptic number.

42517790 is an abundant number, since it is smaller than the sum of its proper divisors (46510282).

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

42517790 is a wasteful number, since it uses less digits than its factorization.

42517790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86792 (or 86785 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 42517790 is about 6520.5666931640. The cubic root of 42517790 is about 349.0252880530.

The spelling of 42517790 in words is "forty-two million, five hundred seventeen thousand, seven hundred ninety".