172841 has 4 divisors (see below), whose sum is σ = 173712. Its totient is φ = 171972.

The previous prime is 172829. The next prime is 172849. The reversal of 172841 is 148271.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 148271 = 67 ⋅2213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172841 is a prime.

It is a super-2 number, since 2×172841² = 59748022562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172849) 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, 26 + ... + 588.

It is an arithmetic number, because the mean of its divisors is an integer number (43428).

2¹⁷²⁸⁴¹ is an apocalyptic number.

It is an amenable number.

172841 is a deficient number, since it is larger than the sum of its proper divisors (871).

172841 is an equidigital number, since it uses as much as digits as its factorization.

172841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its digits is 448, while the sum is 23.

The square root of 172841 is about 415.7415062271. The cubic root of 172841 is about 55.7034708666.

The spelling of 172841 in words is "one hundred seventy-two thousand, eight hundred forty-one".