42387489 has 16 divisors (see below), whose sum is σ = 62985600. Its totient is φ = 28173168.

The previous prime is 42387479. The next prime is 42387491. The reversal of 42387489 is 98478324.

It is not a de Polignac number, because 42387489 - 2⁹ = 42386977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42387419) 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, 7507 + ... + 11879.

It is an arithmetic number, because the mean of its divisors is an integer number (3936600).

Almost surely, 2^42387489 is an apocalyptic number.

It is an amenable number.

42387489 is a deficient number, since it is larger than the sum of its proper divisors (20598111).

42387489 is a wasteful number, since it uses less digits than its factorization.

42387489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4741 (or 4735 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 42387489 is about 6510.5674867864. The cubic root of 42387489 is about 348.6683795581.

The spelling of 42387489 in words is "forty-two million, three hundred eighty-seven thousand, four hundred eighty-nine".