42124987 has 2 divisors, whose sum is σ = 42124988. Its totient is φ = 42124986.

The previous prime is 42124969. The next prime is 42125047. The reversal of 42124987 is 78942124.

42124987 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 is a cyclic number.

It is not a de Polignac number, because 42124987 - 2¹¹ = 42122939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42124967) 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, 21062493 + 21062494.

It is an arithmetic number, because the mean of its divisors is an integer number (21062494).

Almost surely, 2^42124987 is an apocalyptic number.

42124987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42124987 is an equidigital number, since it uses as much as digits as its factorization.

42124987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 42124987 is about 6490.3764913909. The cubic root of 42124987 is about 347.9471310665.

It can be divided in two parts, 4 and 2124987, that multiplied together give a palindrome (8499948).

The spelling of 42124987 in words is "forty-two million, one hundred twenty-four thousand, nine hundred eighty-seven".