42771587 has 2 divisors, whose sum is σ = 42771588. Its totient is φ = 42771586.

The previous prime is 42771563. The next prime is 42771601. The reversal of 42771587 is 78517724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42771587 - 2⁶ = 42771523 is a prime.

It is not a weakly prime, because it can be changed into another prime (42771557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21385793 + 21385794.

It is an arithmetic number, because the mean of its divisors is an integer number (21385794).

Almost surely, 2^42771587 is an apocalyptic number.

42771587 is a deficient number, since it is larger than the sum of its proper divisors (1).

42771587 is an equidigital number, since it uses as much as digits as its factorization.

42771587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109760, while the sum is 41.

The square root of 42771587 is about 6539.9990061161. Note that the first 3 decimals coincide. The cubic root of 42771587 is about 349.7183775390.

The spelling of 42771587 in words is "forty-two million, seven hundred seventy-one thousand, five hundred eighty-seven".