161860441 has 4 divisors (see below), whose sum is σ = 162457984. Its totient is φ = 161262900.

The previous prime is 161860403. The next prime is 161860481. The reversal of 161860441 is 144068161.

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.

It is a cyclic number.

It is not a de Polignac number, because 161860441 - 2¹⁷ = 161729369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161860481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298365 + ... + 298906.

It is an arithmetic number, because the mean of its divisors is an integer number (40614496).

Almost surely, 2^161860441 is an apocalyptic number.

It is an amenable number.

161860441 is a deficient number, since it is larger than the sum of its proper divisors (597543).

161860441 is an equidigital number, since it uses as much as digits as its factorization.

161860441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597542.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 161860441 is about 12722.4384848189. The cubic root of 161860441 is about 544.9795924238.

The spelling of 161860441 in words is "one hundred sixty-one million, eight hundred sixty thousand, four hundred forty-one".