42051807 has 54 divisors (see below), whose sum is σ = 75008232. Its totient is φ = 22235472.

The previous prime is 42051803. The next prime is 42051833. The reversal of 42051807 is 70815024.

42051807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42051807 - 2² = 42051803 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42051803) 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 53 ways as a sum of consecutive naturals, for example, 977928 + ... + 977970.

Almost surely, 2^42051807 is an apocalyptic number.

42051807 is a deficient number, since it is larger than the sum of its proper divisors (32956425).

42051807 is a wasteful number, since it uses less digits than its factorization.

42051807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 42051807 is about 6484.7364634193. The cubic root of 42051807 is about 347.7455283927.

The spelling of 42051807 in words is "forty-two million, fifty-one thousand, eight hundred seven".