42541687 has 2 divisors, whose sum is σ = 42541688. Its totient is φ = 42541686.

The previous prime is 42541679. The next prime is 42541691. The reversal of 42541687 is 78614524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42541687 - 2³ = 42541679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42541657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21270843 + 21270844.

It is an arithmetic number, because the mean of its divisors is an integer number (21270844).

Almost surely, 2^42541687 is an apocalyptic number.

42541687 is a deficient number, since it is larger than the sum of its proper divisors (1).

42541687 is an equidigital number, since it uses as much as digits as its factorization.

42541687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 37.

The square root of 42541687 is about 6522.3988685146. The cubic root of 42541687 is about 349.0906653550.

It can be divided in two parts, 425416 and 87, that added together give a triangular number (425503 = T₉₂₂).

The spelling of 42541687 in words is "forty-two million, five hundred forty-one thousand, six hundred eighty-seven".