102999642 has 16 divisors (see below), whose sum is σ = 208822080. Its totient is φ = 33862752.

The previous prime is 102999641. The next prime is 102999653. The reversal of 102999642 is 246999201.

It is a junction number, because it is equal to n+sod(n) for n = 102999594 and 102999603.

It is not an unprimeable number, because it can be changed into a prime (102999641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117142 + ... + 118017.

It is an arithmetic number, because the mean of its divisors is an integer number (13051380).

Almost surely, 2^102999642 is an apocalyptic number.

102999642 is an abundant number, since it is smaller than the sum of its proper divisors (105822438).

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

102999642 is a wasteful number, since it uses less digits than its factorization.

102999642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235237.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 102999642 is about 10148.8739276828. The cubic root of 102999642 is about 468.7542716766.

The spelling of 102999642 in words is "one hundred two million, nine hundred ninety-nine thousand, six hundred forty-two".