42851870 has 8 divisors (see below), whose sum is σ = 77133384. Its totient is φ = 17140744.

The previous prime is 42851869. The next prime is 42851873. The reversal of 42851870 is 7815824.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42851870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42851873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2142584 + ... + 2142603.

It is an arithmetic number, because the mean of its divisors is an integer number (9641673).

Almost surely, 2^42851870 is an apocalyptic number.

42851870 is a deficient number, since it is larger than the sum of its proper divisors (34281514).

42851870 is a wasteful number, since it uses less digits than its factorization.

42851870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285194.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 42851870 is about 6546.1339735755. The cubic root of 42851870 is about 349.9370499031.

The spelling of 42851870 in words is "forty-two million, eight hundred fifty-one thousand, eight hundred seventy".