42012077 has 2 divisors, whose sum is σ = 42012078. Its totient is φ = 42012076.

The previous prime is 42012073. The next prime is 42012079. The reversal of 42012077 is 77021024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 18139081 = 4886^2 + 4259^2 .

It is a cyclic number.

It is not a de Polignac number, because 42012077 - 2² = 42012073 is a prime.

It is a super-2 number, since 2×42012077² = 3530029227707858, which contains 22 as substring.

Together with 42012079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42012073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006038 + 21006039.

It is an arithmetic number, because the mean of its divisors is an integer number (21006039).

Almost surely, 2^42012077 is an apocalyptic number.

It is an amenable number.

42012077 is a deficient number, since it is larger than the sum of its proper divisors (1).

42012077 is an equidigital number, since it uses as much as digits as its factorization.

42012077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 42012077 is about 6481.6723922148. The cubic root of 42012077 is about 347.6359787352.

The spelling of 42012077 in words is "forty-two million, twelve thousand, seventy-seven".