42851578 has 48 divisors (see below), whose sum is σ = 82473984. Its totient is φ = 16511040.

The previous prime is 42851563. The next prime is 42851603. The reversal of 42851578 is 87515824.

It is a self number, because there is not a number n which added to its sum of digits gives 42851578.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136750 + ... + 137062.

It is an arithmetic number, because the mean of its divisors is an integer number (1718208).

Almost surely, 2^42851578 is an apocalyptic number.

42851578 is a deficient number, since it is larger than the sum of its proper divisors (39622406).

42851578 is a wasteful number, since it uses less digits than its factorization.

42851578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 460 counting only the distinct ones).

The product of its digits is 89600, while the sum is 40.

The square root of 42851578 is about 6546.1116702971. Note that the first 3 decimals coincide. The cubic root of 42851578 is about 349.9362550576.

It can be divided in two parts, 4 and 2851578, that added together give a palindrome (2851582).

The spelling of 42851578 in words is "forty-two million, eight hundred fifty-one thousand, five hundred seventy-eight".