16716145 has 4 divisors (see below), whose sum is σ = 20059380. Its totient is φ = 13372912.

The previous prime is 16716137. The next prime is 16716149. The reversal of 16716145 is 54161761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54161761 = 19 ⋅2850619.

It can be written as a sum of positive squares in 2 ways, for example, as 10284849 + 6431296 = 3207^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 16716145 - 2³ = 16716137 is a prime.

It is a super-2 number, since 2×16716145² = 558859007322050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16716149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671610 + ... + 1671619.

It is an arithmetic number, because the mean of its divisors is an integer number (5014845).

Almost surely, 2^16716145 is an apocalyptic number.

It is an amenable number.

16716145 is a deficient number, since it is larger than the sum of its proper divisors (3343235).

16716145 is an equidigital number, since it uses as much as digits as its factorization.

16716145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343234.

The product of its digits is 5040, while the sum is 31.

The square root of 16716145 is about 4088.5382473446. The cubic root of 16716145 is about 255.6889991656.

It can be divided in two parts, 16716 and 145, that added together give a palindrome (16861).

The spelling of 16716145 in words is "sixteen million, seven hundred sixteen thousand, one hundred forty-five".