16506145 has 4 divisors (see below), whose sum is σ = 19807380. Its totient is φ = 13204912.

The previous prime is 16506101. The next prime is 16506163. The reversal of 16506145 is 54160561.

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 2421136 + 14085009 = 1556^2 + 3753^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506145 - 2¹³ = 16497953 is a prime.

It is a super-2 number, since 2×16506145² = 544905645522050, 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, 1650610 + ... + 1650619.

It is an arithmetic number, because the mean of its divisors is an integer number (4951845).

Almost surely, 2^16506145 is an apocalyptic number.

It is an amenable number.

16506145 is a deficient number, since it is larger than the sum of its proper divisors (3301235).

16506145 is an equidigital number, since it uses as much as digits as its factorization.

16506145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301234.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 16506145 is about 4062.7755291180. The cubic root of 16506145 is about 254.6137687508.

The spelling of 16506145 in words is "sixteen million, five hundred six thousand, one hundred forty-five".