42905837 has 4 divisors (see below), whose sum is σ = 46206300. Its totient is φ = 39605376.

The previous prime is 42905831. The next prime is 42905839. The reversal of 42905837 is 73850924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10118761 + 32787076 = 3181^2 + 5726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42905837 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 42905837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42905831) 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, 1650212 + ... + 1650237.

It is an arithmetic number, because the mean of its divisors is an integer number (11551575).

Almost surely, 2^42905837 is an apocalyptic number.

It is an amenable number.

42905837 is a deficient number, since it is larger than the sum of its proper divisors (3300463).

42905837 is a wasteful number, since it uses less digits than its factorization.

42905837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300462.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 42905837 is about 6550.2547278713. The cubic root of 42905837 is about 350.0838900952.

The spelling of 42905837 in words is "forty-two million, nine hundred five thousand, eight hundred thirty-seven".