42087489 has 16 divisors (see below), whose sum is σ = 59342400. Its totient is φ = 26459136.

The previous prime is 42087481. The next prime is 42087503. The reversal of 42087489 is 98478024.

It is not a de Polignac number, because 42087489 - 2³ = 42087481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42087489.

It is not an unprimeable number, because it can be changed into a prime (42087481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11697 + ... + 14865.

It is an arithmetic number, because the mean of its divisors is an integer number (3708900).

Almost surely, 2^42087489 is an apocalyptic number.

It is an amenable number.

42087489 is a deficient number, since it is larger than the sum of its proper divisors (17254911).

42087489 is a wasteful number, since it uses less digits than its factorization.

42087489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 42087489 is about 6487.4871098138. The cubic root of 42087489 is about 347.8438574850.

The spelling of 42087489 in words is "forty-two million, eighty-seven thousand, four hundred eighty-nine".