16442587 has 12 divisors (see below), whose sum is σ = 20253240. Its totient is φ = 13263936.

The previous prime is 16442521. The next prime is 16442609. The reversal of 16442587 is 78524461.

It is not a de Polignac number, because 16442587 - 2¹¹ = 16440539 is a prime.

It is a super-3 number, since 3×16442587³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16442287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9037 + ... + 10702.

It is an arithmetic number, because the mean of its divisors is an integer number (1687770).

Almost surely, 2^16442587 is an apocalyptic number.

16442587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16442587 is a deficient number, since it is larger than the sum of its proper divisors (3810653).

16442587 is a wasteful number, since it uses less digits than its factorization.

16442587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19770 (or 19763 counting only the distinct ones).

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

The square root of 16442587 is about 4054.9459922421. The cubic root of 16442587 is about 254.2865460232.

The spelling of 16442587 in words is "sixteen million, four hundred forty-two thousand, five hundred eighty-seven".