42505783 has 16 divisors (see below), whose sum is σ = 44755200. Its totient is φ = 40340160.

The previous prime is 42505781. The next prime is 42505787. The reversal of 42505783 is 38750524.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42505783 - 2¹ = 42505781 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 (42505781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305728 + ... + 305866.

It is an arithmetic number, because the mean of its divisors is an integer number (2797200).

Almost surely, 2^42505783 is an apocalyptic number.

42505783 is a deficient number, since it is larger than the sum of its proper divisors (2249417).

42505783 is a wasteful number, since it uses less digits than its factorization.

42505783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 42505783 is about 6519.6459259687. The cubic root of 42505783 is about 348.9924301114.

The spelling of 42505783 in words is "forty-two million, five hundred five thousand, seven hundred eighty-three".