42809495 has 16 divisors (see below), whose sum is σ = 52788288. Its totient is φ = 33315840.

The previous prime is 42809483. The next prime is 42809497. The reversal of 42809495 is 59490824.

42809495 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-42809495 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 (42809497) 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 15 ways as a sum of consecutive naturals, for example, 28862 + ... + 30308.

It is an arithmetic number, because the mean of its divisors is an integer number (3299268).

Almost surely, 2^42809495 is an apocalyptic number.

42809495 is a deficient number, since it is larger than the sum of its proper divisors (9978793).

42809495 is a wasteful number, since it uses less digits than its factorization.

42809495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 42809495 is about 6542.8965298253. The cubic root of 42809495 is about 349.8216642499.

The spelling of 42809495 in words is "forty-two million, eight hundred nine thousand, four hundred ninety-five".