42251807 has 8 divisors (see below), whose sum is σ = 46079040. Its totient is φ = 38507040.

The previous prime is 42251789. The next prime is 42251809. The reversal of 42251807 is 70815224.

42251807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42251807 - 2¹⁰ = 42250783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42251807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19544 + ... + 21597.

It is an arithmetic number, because the mean of its divisors is an integer number (5759880).

Almost surely, 2^42251807 is an apocalyptic number.

42251807 is a deficient number, since it is larger than the sum of its proper divisors (3827233).

42251807 is a wasteful number, since it uses less digits than its factorization.

42251807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41233.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 42251807 is about 6500.1389985138. The cubic root of 42251807 is about 348.2959537026.

The spelling of 42251807 in words is "forty-two million, two hundred fifty-one thousand, eight hundred seven".