918241 has 4 divisors (see below), whose sum is σ = 920212. Its totient is φ = 916272.

The previous prime is 918223. The next prime is 918257. The reversal of 918241 is 142819.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 142819 = 251 ⋅569.

It can be written as a sum of positive squares in 2 ways, for example, as 254016 + 664225 = 504^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 918241 - 2⁵ = 918209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918041) 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, 151 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (230053).

2⁹¹⁸²⁴¹ is an apocalyptic number.

It is an amenable number.

918241 is a deficient number, since it is larger than the sum of its proper divisors (1971).

918241 is a wasteful number, since it uses less digits than its factorization.

918241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970.

The product of its digits is 576, while the sum is 25.

The square root of 918241 is about 958.2489238189. The cubic root of 918241 is about 97.1968581574.

The spelling of 918241 in words is "nine hundred eighteen thousand, two hundred forty-one".