42037987 has 2 divisors, whose sum is σ = 42037988. Its totient is φ = 42037986.

The previous prime is 42037979. The next prime is 42038021. The reversal of 42037987 is 78973024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42037987 - 2³ = 42037979 is a prime.

It is not a weakly prime, because it can be changed into another prime (42038987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21018993 + 21018994.

It is an arithmetic number, because the mean of its divisors is an integer number (21018994).

Almost surely, 2^42037987 is an apocalyptic number.

42037987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42037987 is an equidigital number, since it uses as much as digits as its factorization.

42037987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 42037987 is about 6483.6707967015. The cubic root of 42037987 is about 347.7074295958.

The spelling of 42037987 in words is "forty-two million, thirty-seven thousand, nine hundred eighty-seven".