42905901 has 4 divisors (see below), whose sum is σ = 57207872. Its totient is φ = 28603932.

The previous prime is 42905899. The next prime is 42905917. The reversal of 42905901 is 10950924.

It is a happy number.

42905901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42905901 - 2¹ = 42905899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42905981) 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 3 ways as a sum of consecutive naturals, for example, 7150981 + ... + 7150986.

It is an arithmetic number, because the mean of its divisors is an integer number (14301968).

Almost surely, 2^42905901 is an apocalyptic number.

It is an amenable number.

42905901 is a deficient number, since it is larger than the sum of its proper divisors (14301971).

42905901 is a wasteful number, since it uses less digits than its factorization.

42905901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14301970.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 42905901 is about 6550.2596131756. The cubic root of 42905901 is about 350.0840641613.

The spelling of 42905901 in words is "forty-two million, nine hundred five thousand, nine hundred one".