918541 has 4 divisors (see below), whose sum is σ = 989212. Its totient is φ = 847872.

The previous prime is 918539. The next prime is 918563. The reversal of 918541 is 145819.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 532900 + 385641 = 730^2 + 621^2 .

It is a cyclic number.

It is not a de Polignac number, because 918541 - 2¹ = 918539 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 (918581) 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, 35316 + ... + 35341.

It is an arithmetic number, because the mean of its divisors is an integer number (247303).

2⁹¹⁸⁵⁴¹ is an apocalyptic number.

It is an amenable number.

918541 is a deficient number, since it is larger than the sum of its proper divisors (70671).

918541 is a wasteful number, since it uses less digits than its factorization.

918541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70670.

The product of its digits is 1440, while the sum is 28.

The square root of 918541 is about 958.4054465622. The cubic root of 918541 is about 97.2074421190.

The spelling of 918541 in words is "nine hundred eighteen thousand, five hundred forty-one".