16001465 has 8 divisors (see below), whose sum is σ = 19274760. Its totient is φ = 12752512.

The previous prime is 16001443. The next prime is 16001467. The reversal of 16001465 is 56410061.

It can be written as a sum of positive squares in 4 ways, for example, as 2598544 + 13402921 = 1612^2 + 3661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16001465 - 2¹² = 15997369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16001465.

It is not an unprimeable number, because it can be changed into a prime (16001467) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 4604 + ... + 7293.

It is an arithmetic number, because the mean of its divisors is an integer number (2409345).

Almost surely, 2^16001465 is an apocalyptic number.

It is an amenable number.

16001465 is a deficient number, since it is larger than the sum of its proper divisors (3273295).

16001465 is a wasteful number, since it uses less digits than its factorization.

16001465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12171.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 16001465 is about 4000.1831208083. The cubic root of 16001465 is about 251.9919005123.

The spelling of 16001465 in words is "sixteen million, one thousand, four hundred sixty-five".