42771599 has 16 divisors (see below), whose sum is σ = 47867904. Its totient is φ = 37951200.

The previous prime is 42771587. The next prime is 42771601. The reversal of 42771599 is 99517724.

It is a Cunningham number, because it is equal to 6540²-1.

It is a cyclic number.

It is not a de Polignac number, because 42771599 - 2⁸ = 42771343 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 (42771529) 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, 84782 + ... + 85284.

It is an arithmetic number, because the mean of its divisors is an integer number (2991744).

Almost surely, 2^42771599 is an apocalyptic number.

42771599 is a deficient number, since it is larger than the sum of its proper divisors (5096305).

42771599 is a wasteful number, since it uses less digits than its factorization.

42771599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758.

The product of its digits is 158760, while the sum is 44.

The square root of 42771599 is about 6539.9999235474. Note that the first 4 decimals coincide. The cubic root of 42771599 is about 349.7184102446.

The spelling of 42771599 in words is "forty-two million, seven hundred seventy-one thousand, five hundred ninety-nine".