42134987 has 2 divisors, whose sum is σ = 42134988. Its totient is φ = 42134986.

The previous prime is 42134977. The next prime is 42135013. The reversal of 42134987 is 78943124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42134987 - 2⁶ = 42134923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42134987.

It is not a weakly prime, because it can be changed into another prime (42134927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21067493 + 21067494.

It is an arithmetic number, because the mean of its divisors is an integer number (21067494).

Almost surely, 2^42134987 is an apocalyptic number.

42134987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42134987 is an equidigital number, since it uses as much as digits as its factorization.

42134987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 42134987 is about 6491.1468170116. The cubic root of 42134987 is about 347.9746618051.

The spelling of 42134987 in words is "forty-two million, one hundred thirty-four thousand, nine hundred eighty-seven".