16002145 has 4 divisors (see below), whose sum is σ = 19202580. Its totient is φ = 12801712.

The previous prime is 16002109. The next prime is 16002163. The reversal of 16002145 is 54120061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2096704 + 13905441 = 1448^2 + 3729^2 .

It is a cyclic number.

It is not a de Polignac number, because 16002145 - 2⁷ = 16002017 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1600210 + ... + 1600219.

It is an arithmetic number, because the mean of its divisors is an integer number (4800645).

Almost surely, 2^16002145 is an apocalyptic number.

It is an amenable number.

16002145 is a deficient number, since it is larger than the sum of its proper divisors (3200435).

16002145 is an equidigital number, since it uses as much as digits as its factorization.

16002145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200434.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 16002145 is about 4000.2681160142. The cubic root of 16002145 is about 251.9954700202.

The spelling of 16002145 in words is "sixteen million, two thousand, one hundred forty-five".