989542 has 8 divisors (see below), whose sum is σ = 1508832. Its totient is φ = 486600.

The previous prime is 989533. The next prime is 989557. The reversal of 989542 is 245989.

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

It is a congruent number.

It is an unprimeable number.

989542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3934 + ... + 4177.

It is an arithmetic number, because the mean of its divisors is an integer number (188604).

2⁹⁸⁹⁵⁴² is an apocalyptic number.

989542 is a deficient number, since it is larger than the sum of its proper divisors (519290).

989542 is a wasteful number, since it uses less digits than its factorization.

989542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8174.

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

The square root of 989542 is about 994.7572568220. The cubic root of 989542 is about 99.6501776704.

The spelling of 989542 in words is "nine hundred eighty-nine thousand, five hundred forty-two".