42771565 has 8 divisors (see below), whose sum is σ = 54027360. Its totient is φ = 32416272.

The previous prime is 42771563. The next prime is 42771587. The reversal of 42771565 is 56517724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42771565 - 2¹ = 42771563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42771563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225019 + ... + 225208.

It is an arithmetic number, because the mean of its divisors is an integer number (6753420).

Almost surely, 2^42771565 is an apocalyptic number.

It is an amenable number.

42771565 is a deficient number, since it is larger than the sum of its proper divisors (11255795).

42771565 is a wasteful number, since it uses less digits than its factorization.

42771565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450251.

The product of its digits is 58800, while the sum is 37.

The square root of 42771565 is about 6539.9973241585. The cubic root of 42771565 is about 349.7183175785.

The spelling of 42771565 in words is "forty-two million, seven hundred seventy-one thousand, five hundred sixty-five".