102242146 has 4 divisors (see below), whose sum is σ = 153363222. Its totient is φ = 51121072.

The previous prime is 102242143. The next prime is 102242149. The reversal of 102242146 is 641242201.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (102242143) and next prime (102242149).

It can be written as a sum of positive squares in only one way, i.e., 77352025 + 24890121 = 8795^2 + 4989^2 .

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 not an unprimeable number, because it can be changed into a prime (102242143) by changing a digit.

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, 25560535 + ... + 25560538.

Almost surely, 2^102242146 is an apocalyptic number.

102242146 is a deficient number, since it is larger than the sum of its proper divisors (51121076).

102242146 is an equidigital number, since it uses as much as digits as its factorization.

102242146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51121075.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 102242146 is about 10111.4858453147. The cubic root of 102242146 is about 467.6023145334.

Adding to 102242146 its reverse (641242201), we get a palindrome (743484347).

The spelling of 102242146 in words is "one hundred two million, two hundred forty-two thousand, one hundred forty-six".