42500809 has 8 divisors (see below), whose sum is σ = 45843840. Its totient is φ = 39168336.

The previous prime is 42500807. The next prime is 42500839. The reversal of 42500809 is 90800524.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42500809 - 2¹ = 42500807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42500807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7074 + ... + 11620.

It is an arithmetic number, because the mean of its divisors is an integer number (5730480).

Almost surely, 2^42500809 is an apocalyptic number.

It is an amenable number.

42500809 is a deficient number, since it is larger than the sum of its proper divisors (3343031).

42500809 is a wasteful number, since it uses less digits than its factorization.

42500809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5279.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 42500809 is about 6519.2644523750. The cubic root of 42500809 is about 348.9788166221.

The spelling of 42500809 in words is "forty-two million, five hundred thousand, eight hundred nine".