42208087 has 4 divisors (see below), whose sum is σ = 43004520. Its totient is φ = 41411656.

The previous prime is 42208051. The next prime is 42208091. The reversal of 42208087 is 78080224.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42208087 - 2⁷ = 42207959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42208007) 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, 398137 + ... + 398242.

It is an arithmetic number, because the mean of its divisors is an integer number (10751130).

Almost surely, 2^42208087 is an apocalyptic number.

42208087 is a deficient number, since it is larger than the sum of its proper divisors (796433).

42208087 is an equidigital number, since it uses as much as digits as its factorization.

42208087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796432.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 42208087 is about 6496.7751230899. The cubic root of 42208087 is about 348.1757793210.

The spelling of 42208087 in words is "forty-two million, two hundred eight thousand, eighty-seven".