99972042 has 8 divisors (see below), whose sum is σ = 199944096. Its totient is φ = 33324012.

The previous prime is 99972013. The next prime is 99972043. The reversal of 99972042 is 24027999.

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

99972042 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 99971985 and 99972003.

It is not an unprimeable number, because it can be changed into a prime (99972043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8330998 + ... + 8331009.

It is an arithmetic number, because the mean of its divisors is an integer number (24993012).

Almost surely, 2^99972042 is an apocalyptic number.

99972042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99972042 is a wasteful number, since it uses less digits than its factorization.

99972042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16662012.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 99972042 is about 9998.6020022801. The cubic root of 99972042 is about 464.1156228159.

The spelling of 99972042 in words is "ninety-nine million, nine hundred seventy-two thousand, forty-two".