998542 has 8 divisors (see below), whose sum is σ = 1504800. Its totient is φ = 496944.

The previous prime is 998539. The next prime is 998551. The reversal of 998542 is 245899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×998542² = 1994172251528, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567 + ... + 1522.

It is an arithmetic number, because the mean of its divisors is an integer number (188100).

2⁹⁹⁸⁵⁴² is an apocalyptic number.

998542 is a deficient number, since it is larger than the sum of its proper divisors (506258).

998542 is a wasteful number, since it uses less digits than its factorization.

998542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330.

The product of its digits is 25920, while the sum is 37.

The square root of 998542 is about 999.2707340856. The cubic root of 998542 is about 99.9513763612.

It can be divided in two parts, 99854 and 2, that added together give a square (99856 = 316²).

The spelling of 998542 in words is "nine hundred ninety-eight thousand, five hundred forty-two".