16509142 has 32 divisors (see below), whose sum is σ = 28957824. Its totient is φ = 6988800.

The previous prime is 16509139. The next prime is 16509151. The reversal of 16509142 is 24190561.

It is a self number, because there is not a number n which added to its sum of digits gives 16509142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17667 + ... + 18577.

It is an arithmetic number, because the mean of its divisors is an integer number (904932).

Almost surely, 2^16509142 is an apocalyptic number.

16509142 is a deficient number, since it is larger than the sum of its proper divisors (12448682).

16509142 is a wasteful number, since it uses less digits than its factorization.

16509142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 16509142 is about 4063.1443489002. The cubic root of 16509142 is about 254.6291777856.

The spelling of 16509142 in words is "sixteen million, five hundred nine thousand, one hundred forty-two".