42242477 has 2 divisors, whose sum is σ = 42242478. Its totient is φ = 42242476.

The previous prime is 42242471. The next prime is 42242479. The reversal of 42242477 is 77424224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42237001 + 5476 = 6499^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 42242477 - 2⁶ = 42242413 is a prime.

Together with 42242479, 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 (42242471) 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, 21121238 + 21121239.

It is an arithmetic number, because the mean of its divisors is an integer number (21121239).

Almost surely, 2^42242477 is an apocalyptic number.

It is an amenable number.

42242477 is a deficient number, since it is larger than the sum of its proper divisors (1).

42242477 is an equidigital number, since it uses as much as digits as its factorization.

42242477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 32.

The square root of 42242477 is about 6499.4212819296. The cubic root of 42242477 is about 348.2703150321.

The spelling of 42242477 in words is "forty-two million, two hundred forty-two thousand, four hundred seventy-seven".