42387487 has 4 divisors (see below), whose sum is σ = 42799120. Its totient is φ = 41975856.

The previous prime is 42387479. The next prime is 42387491. The reversal of 42387487 is 78478324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42387487 - 2³ = 42387479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42387427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205662 + ... + 205867.

It is an arithmetic number, because the mean of its divisors is an integer number (10699780).

Almost surely, 2^42387487 is an apocalyptic number.

42387487 is a deficient number, since it is larger than the sum of its proper divisors (411633).

42387487 is a wasteful number, since it uses less digits than its factorization.

42387487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411632.

The product of its digits is 301056, while the sum is 43.

The square root of 42387487 is about 6510.5673331899. The cubic root of 42387487 is about 348.6683740743.

The spelling of 42387487 in words is "forty-two million, three hundred eighty-seven thousand, four hundred eighty-seven".