102290242 has 4 divisors (see below), whose sum is σ = 153435366. Its totient is φ = 51145120.

The previous prime is 102290213. The next prime is 102290257. The reversal of 102290242 is 242092201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 73977201 + 28313041 = 8601^2 + 5321^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable 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 as a sum of consecutive naturals, namely, 25572559 + ... + 25572562.

Almost surely, 2^102290242 is an apocalyptic number.

102290242 is a deficient number, since it is larger than the sum of its proper divisors (51145124).

102290242 is an equidigital number, since it uses as much as digits as its factorization.

102290242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51145123.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 102290242 is about 10113.8638511698. The cubic root of 102290242 is about 467.6756250556.

The spelling of 102290242 in words is "one hundred two million, two hundred ninety thousand, two hundred forty-two".