16446145 has 4 divisors (see below), whose sum is σ = 19735380. Its totient is φ = 13156912.

The previous prime is 16446121. The next prime is 16446163. The reversal of 16446145 is 54164461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54164461 = 13 ⋅4166497.

It can be written as a sum of positive squares in 2 ways, for example, as 11553201 + 4892944 = 3399^2 + 2212^2 .

It is a cyclic number.

It is not a de Polignac number, because 16446145 - 2²¹ = 14348993 is a prime.

It is a super-2 number, since 2×16446145² = 540951370722050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644610 + ... + 1644619.

It is an arithmetic number, because the mean of its divisors is an integer number (4933845).

Almost surely, 2^16446145 is an apocalyptic number.

It is an amenable number.

16446145 is a deficient number, since it is larger than the sum of its proper divisors (3289235).

16446145 is an equidigital number, since it uses as much as digits as its factorization.

16446145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289234.

The product of its digits is 11520, while the sum is 31.

The square root of 16446145 is about 4055.3846919867. The cubic root of 16446145 is about 254.3048863302.

The spelling of 16446145 in words is "sixteen million, four hundred forty-six thousand, one hundred forty-five".