42177061 has 2 divisors, whose sum is σ = 42177062. Its totient is φ = 42177060.

The previous prime is 42177007. The next prime is 42177071. The reversal of 42177061 is 16077124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40564161 + 1612900 = 6369^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 42177061 - 2¹⁵ = 42144293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42177071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21088530 + 21088531.

It is an arithmetic number, because the mean of its divisors is an integer number (21088531).

Almost surely, 2^42177061 is an apocalyptic number.

It is an amenable number.

42177061 is a deficient number, since it is larger than the sum of its proper divisors (1).

42177061 is an equidigital number, since it uses as much as digits as its factorization.

42177061 is an evil number, because the sum of its binary digits is even.

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

The square root of 42177061 is about 6494.3868840715. The cubic root of 42177061 is about 348.0904469400.

The spelling of 42177061 in words is "forty-two million, one hundred seventy-seven thousand, sixty-one".