102242242 has 4 divisors (see below), whose sum is σ = 153363366. Its totient is φ = 51121120.

The previous prime is 102242237. The next prime is 102242263. The reversal of 102242242 is 242242201.

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., 66732561 + 35509681 = 8169^2 + 5959^2 .

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, 25560559 + ... + 25560562.

Almost surely, 2^102242242 is an apocalyptic number.

102242242 is a deficient number, since it is larger than the sum of its proper divisors (51121124).

102242242 is an equidigital number, since it uses as much as digits as its factorization.

102242242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51121123.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 102242242 is about 10111.4905923904. The cubic root of 102242242 is about 467.6024608846.

Adding to 102242242 its reverse (242242201), we get a palindrome (344484443).

It can be divided in two parts, 1022 and 42242, that added together give a square (43264 = 208²).

The spelling of 102242242 in words is "one hundred two million, two hundred forty-two thousand, two hundred forty-two".