42079851 has 32 divisors (see below), whose sum is σ = 71596800. Its totient is φ = 24157440.

The previous prime is 42079847. The next prime is 42079871. The reversal of 42079851 is 15897024.

It is not a de Polignac number, because 42079851 - 2² = 42079847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42079871) 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 31 ways as a sum of consecutive naturals, for example, 1915 + ... + 9371.

It is an arithmetic number, because the mean of its divisors is an integer number (2237400).

Almost surely, 2^42079851 is an apocalyptic number.

42079851 is a deficient number, since it is larger than the sum of its proper divisors (29516949).

42079851 is a wasteful number, since it uses less digits than its factorization.

42079851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7496 (or 7490 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 42079851 is about 6486.8984114136. The cubic root of 42079851 is about 347.8228140808.

The spelling of 42079851 in words is "forty-two million, seventy-nine thousand, eight hundred fifty-one".