169145 has 4 divisors (see below), whose sum is σ = 202980. Its totient is φ = 135312.

The previous prime is 169129. The next prime is 169151. The reversal of 169145 is 541961.

169145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 92416 + 76729 = 304^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 169145 - 2⁴ = 169129 is a prime.

It is a super-2 number, since 2×169145² = 57220062050, 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, 16910 + ... + 16919.

It is an arithmetic number, because the mean of its divisors is an integer number (50745).

2¹⁶⁹¹⁴⁵ is an apocalyptic number.

It is an amenable number.

169145 is a deficient number, since it is larger than the sum of its proper divisors (33835).

169145 is an equidigital number, since it uses as much as digits as its factorization.

169145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33834.

The product of its digits is 1080, while the sum is 26.

The square root of 169145 is about 411.2724158025. The cubic root of 169145 is about 55.3035556946.

Subtracting 169145 from its reverse (541961), we obtain a triangular number (372816 = T₈₆₃).

The spelling of 169145 in words is "one hundred sixty-nine thousand, one hundred forty-five".