42046987 has 2 divisors, whose sum is σ = 42046988. Its totient is φ = 42046986.

The previous prime is 42046957. The next prime is 42046993. The reversal of 42046987 is 78964024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42046987 - 2¹¹ = 42044939 is a prime.

It is not a weakly prime, because it can be changed into another prime (42046937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21023493 + 21023494.

It is an arithmetic number, because the mean of its divisors is an integer number (21023494).

Almost surely, 2^42046987 is an apocalyptic number.

42046987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42046987 is an equidigital number, since it uses as much as digits as its factorization.

42046987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 42046987 is about 6484.3648108354. The cubic root of 42046987 is about 347.7322416273.

The spelling of 42046987 in words is "forty-two million, forty-six thousand, nine hundred eighty-seven".