99998542 has 16 divisors (see below), whose sum is σ = 172564992. Its totient is φ = 42571800.

The previous prime is 99998513. The next prime is 99998543. The reversal of 99998542 is 24589999.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99998543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21538 + ... + 25765.

It is an arithmetic number, because the mean of its divisors is an integer number (10785312).

Almost surely, 2^99998542 is an apocalyptic number.

99998542 is a deficient number, since it is larger than the sum of its proper divisors (72566450).

99998542 is a wasteful number, since it uses less digits than its factorization.

99998542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47463.

The product of its digits is 2099520, while the sum is 55.

The square root of 99998542 is about 9999.9270997343. The cubic root of 99998542 is about 464.1566275381.

It can be divided in two parts, 9999 and 8542, that multiplied together give a palindrome (85411458).

The spelling of 99998542 in words is "ninety-nine million, nine hundred ninety-eight thousand, five hundred forty-two".