16140865 has 16 divisors (see below), whose sum is σ = 20966400. Its totient is φ = 11858112.

The previous prime is 16140857. The next prime is 16140869. The reversal of 16140865 is 56804161.

It is a cyclic number.

It is not a de Polignac number, because 16140865 - 2³ = 16140857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16140869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15016 + ... + 16054.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^16140865 is an apocalyptic number.

It is an amenable number.

16140865 is a deficient number, since it is larger than the sum of its proper divisors (4825535).

16140865 is a wasteful number, since it uses less digits than its factorization.

16140865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 16140865 is about 4017.5695389128. The cubic root of 16140865 is about 252.7215452565.

The spelling of 16140865 in words is "sixteen million, one hundred forty thousand, eight hundred sixty-five".