16542742 has 4 divisors (see below), whose sum is σ = 24814116. Its totient is φ = 8271370.

The previous prime is 16542739. The next prime is 16542761. The reversal of 16542742 is 24724561.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4135684 + ... + 4135687.

It is an arithmetic number, because the mean of its divisors is an integer number (6203529).

Almost surely, 2^16542742 is an apocalyptic number.

16542742 is a deficient number, since it is larger than the sum of its proper divisors (8271374).

16542742 is an equidigital number, since it uses as much as digits as its factorization.

16542742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8271373.

The product of its digits is 13440, while the sum is 31.

The square root of 16542742 is about 4067.2769760615. The cubic root of 16542742 is about 254.8018042157.

The spelling of 16542742 in words is "sixteen million, five hundred forty-two thousand, seven hundred forty-two".