169021441 has 4 divisors (see below), whose sum is σ = 169115584. Its totient is φ = 168927300.

The previous prime is 169021427. The next prime is 169021451. The reversal of 169021441 is 144120961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144120961 = 4373 ⋅32957.

It is a cyclic number.

It is not a de Polignac number, because 169021441 - 2⁵ = 169021409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169021451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44325 + ... + 47986.

It is an arithmetic number, because the mean of its divisors is an integer number (42278896).

Almost surely, 2^169021441 is an apocalyptic number.

It is an amenable number.

169021441 is a deficient number, since it is larger than the sum of its proper divisors (94143).

169021441 is an equidigital number, since it uses as much as digits as its factorization.

169021441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94142.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 169021441 is about 13000.8246276919. The cubic root of 169021441 is about 552.9008615351.

The spelling of 169021441 in words is "one hundred sixty-nine million, twenty-one thousand, four hundred forty-one".