170561441 has 4 divisors (see below), whose sum is σ = 176442900. Its totient is φ = 164679984.

The previous prime is 170561437. The next prime is 170561467. The reversal of 170561441 is 144165071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 144165071 = 3779 ⋅38149.

It can be written as a sum of positive squares in 2 ways, for example, as 98803600 + 71757841 = 9940^2 + 8471^2 .

It is a cyclic number.

It is not a de Polignac number, because 170561441 - 2² = 170561437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 5881429 = 170561441 / (1 + 7 + 0 + 5 + 6 + 1 + 4 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170561401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2940686 + ... + 2940743.

It is an arithmetic number, because the mean of its divisors is an integer number (44110725).

Almost surely, 2^170561441 is an apocalyptic number.

It is an amenable number.

170561441 is a deficient number, since it is larger than the sum of its proper divisors (5881459).

170561441 is an equidigital number, since it uses as much as digits as its factorization.

170561441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881458.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 170561441 is about 13059.9173427706. The cubic root of 170561441 is about 554.5749969774.

The spelling of 170561441 in words is "one hundred seventy million, five hundred sixty-one thousand, four hundred forty-one".