16465 has 8 divisors (see below), whose sum is σ = 20520. Its totient is φ = 12672.

The previous prime is 16453. The next prime is 16477. The reversal of 16465 is 56461.

It is an interprime number because it is at equal distance from previous prime (16453) and next prime (16477).

It can be written as a sum of positive squares in 4 ways, for example, as 2304 + 14161 = 48^2 + 119^2 .

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 16465 - 2⁵ = 16433 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141 + ... + 229.

It is an arithmetic number, because the mean of its divisors is an integer number (2565).

2¹⁶⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

16465 is a deficient number, since it is larger than the sum of its proper divisors (4055).

16465 is an equidigital number, since it uses as much as digits as its factorization.

16465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131.

The product of its digits is 720, while the sum is 22.

The square root of 16465 is about 128.3160161476. The cubic root of 16465 is about 25.4402033461.

The spelling of 16465 in words is "sixteen thousand, four hundred sixty-five".