42591506 has 8 divisors (see below), whose sum is σ = 64375344. Its totient is φ = 21133060.

The previous prime is 42591491. The next prime is 42591509. The reversal of 42591506 is 60519524.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (42591509) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 81020 + ... + 81543.

It is an arithmetic number, because the mean of its divisors is an integer number (8046918).

Almost surely, 2^42591506 is an apocalyptic number.

42591506 is a deficient number, since it is larger than the sum of its proper divisors (21783838).

42591506 is a wasteful number, since it uses less digits than its factorization.

42591506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162696.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 42591506 is about 6526.2168214058. The cubic root of 42591506 is about 349.2268812623.

The spelling of 42591506 in words is "forty-two million, five hundred ninety-one thousand, five hundred six".