998541 has 16 divisors (see below), whose sum is σ = 1528320. Its totient is φ = 643680.

The previous prime is 998539. The next prime is 998551. The reversal of 998541 is 145899.

It is not a de Polignac number, because 998541 - 2¹ = 998539 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 998496 and 998505.

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 998541.

It is not an unprimeable number, because it can be changed into a prime (998551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241 + ... + 1433.

It is an arithmetic number, because the mean of its divisors is an integer number (95520).

2⁹⁹⁸⁵⁴¹ is an apocalyptic number.

It is an amenable number.

998541 is a deficient number, since it is larger than the sum of its proper divisors (529779).

998541 is a wasteful number, since it uses less digits than its factorization.

998541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1227 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 998541 is about 999.2702337206. The cubic root of 998541 is about 99.9513429955.

The spelling of 998541 in words is "nine hundred ninety-eight thousand, five hundred forty-one".