99999542 has 16 divisors (see below), whose sum is σ = 159423552. Its totient is φ = 46880640.

The previous prime is 99999541. The next prime is 99999547. The reversal of 99999542 is 24599999.

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 (99999541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3788 + ... + 14640.

It is an arithmetic number, because the mean of its divisors is an integer number (9963972).

Almost surely, 2^99999542 is an apocalyptic number.

99999542 is a deficient number, since it is larger than the sum of its proper divisors (59424010).

99999542 is a wasteful number, since it uses less digits than its factorization.

99999542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11143.

The product of its digits is 2361960, while the sum is 56.

The square root of 99999542 is about 9999.9770999738. The cubic root of 99999542 is about 464.1581747443.

The spelling of 99999542 in words is "ninety-nine million, nine hundred ninety-nine thousand, five hundred forty-two".