16171145 has 8 divisors (see below), whose sum is σ = 19469256. Its totient is φ = 12894336.

The previous prime is 16171123. The next prime is 16171151. The reversal of 16171145 is 54117161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 139129 + 16032016 = 373^2 + 4004^2 .

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 16171145 - 2¹² = 16167049 is a prime.

It is a super-2 number, since 2×16171145² = 523011861222050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3602 + ... + 6731.

It is an arithmetic number, because the mean of its divisors is an integer number (2433657).

Almost surely, 2^16171145 is an apocalyptic number.

It is an amenable number.

16171145 is a deficient number, since it is larger than the sum of its proper divisors (3298111).

16171145 is a wasteful number, since it uses less digits than its factorization.

16171145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651.

The product of its digits is 840, while the sum is 26.

The square root of 16171145 is about 4021.3362207107. The cubic root of 16171145 is about 252.8794803715.

The spelling of 16171145 in words is "sixteen million, one hundred seventy-one thousand, one hundred forty-five".