16542681 has 16 divisors (see below), whose sum is σ = 23151744. Its totient is φ = 10486784.

The previous prime is 16542667. The next prime is 16542709. The reversal of 16542681 is 18624561.

It is a cyclic number.

It is not a de Polignac number, because 16542681 - 2⁷ = 16542553 is a prime.

It is a super-2 number, since 2×16542681² = 547320589335522, which contains 22 as substring.

Its product of digits (11520) is a multiple of the sum of its prime divisors (1440).

It is not an unprimeable number, because it can be changed into a prime (16542601) 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, 12985 + ... + 14201.

It is an arithmetic number, because the mean of its divisors is an integer number (1446984).

Almost surely, 2^16542681 is an apocalyptic number.

It is an amenable number.

16542681 is a deficient number, since it is larger than the sum of its proper divisors (6609063).

16542681 is a wasteful number, since it uses less digits than its factorization.

16542681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440.

The product of its digits is 11520, while the sum is 33.

The square root of 16542681 is about 4067.2694771800. The cubic root of 16542681 is about 254.8014910285.

The spelling of 16542681 in words is "sixteen million, five hundred forty-two thousand, six hundred eighty-one".