998741 has 4 divisors (see below), whose sum is σ = 1025772. Its totient is φ = 971712.

The previous prime is 998737. The next prime is 998743. The reversal of 998741 is 147899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 147899 = 131 ⋅1129.

It can be written as a sum of positive squares in 2 ways, for example, as 442225 + 556516 = 665^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 998741 - 2² = 998737 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 998695 and 998704.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998741.

It is not an unprimeable number, because it can be changed into a prime (998743) 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, 13460 + ... + 13533.

It is an arithmetic number, because the mean of its divisors is an integer number (256443).

2⁹⁹⁸⁷⁴¹ is an apocalyptic number.

It is an amenable number.

998741 is a deficient number, since it is larger than the sum of its proper divisors (27031).

998741 is a wasteful number, since it uses less digits than its factorization.

998741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27030.

The product of its digits is 18144, while the sum is 38.

The square root of 998741 is about 999.3703017401. The cubic root of 998741 is about 99.9580157090.

The spelling of 998741 in words is "nine hundred ninety-eight thousand, seven hundred forty-one".