42277771 has 2 divisors, whose sum is σ = 42277772. Its totient is φ = 42277770.

The previous prime is 42277757. The next prime is 42277777. The reversal of 42277771 is 17777224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42277771 - 2⁹ = 42277259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42277771.

It is not a weakly prime, because it can be changed into another prime (42277777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21138885 + 21138886.

It is an arithmetic number, because the mean of its divisors is an integer number (21138886).

Almost surely, 2^42277771 is an apocalyptic number.

42277771 is a deficient number, since it is larger than the sum of its proper divisors (1).

42277771 is an equidigital number, since it uses as much as digits as its factorization.

42277771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38416, while the sum is 37.

The square root of 42277771 is about 6502.1358798475. The cubic root of 42277771 is about 348.3672824421.

The spelling of 42277771 in words is "forty-two million, two hundred seventy-seven thousand, seven hundred seventy-one".