42055787 has 2 divisors, whose sum is σ = 42055788. Its totient is φ = 42055786.

The previous prime is 42055733. The next prime is 42055789. The reversal of 42055787 is 78755024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42055787 - 2⁶ = 42055723 is a prime.

Together with 42055789, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42055787.

It is not a weakly prime, because it can be changed into another prime (42055789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21027893 + 21027894.

It is an arithmetic number, because the mean of its divisors is an integer number (21027894).

Almost surely, 2^42055787 is an apocalyptic number.

42055787 is a deficient number, since it is larger than the sum of its proper divisors (1).

42055787 is an equidigital number, since it uses as much as digits as its factorization.

42055787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 42055787 is about 6485.0433306185. The cubic root of 42055787 is about 347.7564988570.

The spelling of 42055787 in words is "forty-two million, fifty-five thousand, seven hundred eighty-seven".