42120554087 has 2 divisors, whose sum is σ = 42120554088. Its totient is φ = 42120554086.

The previous prime is 42120554039. The next prime is 42120554131. The reversal of 42120554087 is 78045502124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42120554087 - 2⁶ = 42120554023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42120554087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42120514087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060277043 + 21060277044.

It is an arithmetic number, because the mean of its divisors is an integer number (21060277044).

Almost surely, 2^42120554087 is an apocalyptic number.

42120554087 is a deficient number, since it is larger than the sum of its proper divisors (1).

42120554087 is an equidigital number, since it uses as much as digits as its factorization.

42120554087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 89600, while the sum is 38.

The spelling of 42120554087 in words is "forty-two billion, one hundred twenty million, five hundred fifty-four thousand, eighty-seven".