42771061 has 4 divisors (see below), whose sum is σ = 42878124. Its totient is φ = 42664000.

The previous prime is 42771023. The next prime is 42771067. The reversal of 42771061 is 16017724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39816100 + 2954961 = 6310^2 + 1719^2 .

It is a cyclic number.

It is not a de Polignac number, because 42771061 - 2⁹ = 42770549 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 (42771067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52930 + ... + 53731.

It is an arithmetic number, because the mean of its divisors is an integer number (10719531).

Almost surely, 2^42771061 is an apocalyptic number.

It is an amenable number.

42771061 is a deficient number, since it is larger than the sum of its proper divisors (107063).

42771061 is a wasteful number, since it uses less digits than its factorization.

42771061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107062.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 42771061 is about 6539.9587919191. The cubic root of 42771061 is about 349.7169439344.

Adding to 42771061 its reverse (16017724), we get a palindrome (58788785).

The spelling of 42771061 in words is "forty-two million, seven hundred seventy-one thousand, sixty-one".