42087901 has 2 divisors, whose sum is σ = 42087902. Its totient is φ = 42087900.

The previous prime is 42087893. The next prime is 42087911. The reversal of 42087901 is 10978024.

42087901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24740676 + 17347225 = 4974^2 + 4165^2 .

It is a cyclic number.

It is not a de Polignac number, because 42087901 - 2³ = 42087893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42087911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21043950 + 21043951.

It is an arithmetic number, because the mean of its divisors is an integer number (21043951).

Almost surely, 2^42087901 is an apocalyptic number.

It is an amenable number.

42087901 is a deficient number, since it is larger than the sum of its proper divisors (1).

42087901 is an equidigital number, since it uses as much as digits as its factorization.

42087901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 42087901 is about 6487.5188631710. The cubic root of 42087901 is about 347.8449925111.

The spelling of 42087901 in words is "forty-two million, eighty-seven thousand, nine hundred one".