42771013 has 2 divisors, whose sum is σ = 42771014. Its totient is φ = 42771012.

The previous prime is 42770999. The next prime is 42771019. The reversal of 42771013 is 31017724.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37234404 + 5536609 = 6102^2 + 2353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42771013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42771019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21385506 + 21385507.

It is an arithmetic number, because the mean of its divisors is an integer number (21385507).

Almost surely, 2^42771013 is an apocalyptic number.

It is an amenable number.

42771013 is a deficient number, since it is larger than the sum of its proper divisors (1).

42771013 is an equidigital number, since it uses as much as digits as its factorization.

42771013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 42771013 is about 6539.9551221702. The cubic root of 42771013 is about 349.7168131106.

Adding to 42771013 its reverse (31017724), we get a palindrome (73788737).

The spelling of 42771013 in words is "forty-two million, seven hundred seventy-one thousand, thirteen".