42103987 has 2 divisors, whose sum is σ = 42103988. Its totient is φ = 42103986.

The previous prime is 42103979. The next prime is 42104003. The reversal of 42103987 is 78930124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42103987 - 2³ = 42103979 is a prime.

It is not a weakly prime, because it can be changed into another prime (42103907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21051993 + 21051994.

It is an arithmetic number, because the mean of its divisors is an integer number (21051994).

Almost surely, 2^42103987 is an apocalyptic number.

42103987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42103987 is an equidigital number, since it uses as much as digits as its factorization.

42103987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 42103987 is about 6488.7585099154. The cubic root of 42103987 is about 347.8893023302.

The spelling of 42103987 in words is "forty-two million, one hundred three thousand, nine hundred eighty-seven".