102142246 has 4 divisors (see below), whose sum is σ = 153213372. Its totient is φ = 51071122.

The previous prime is 102142217. The next prime is 102142247. The reversal of 102142246 is 642241201.

It is a happy number.

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

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102142247) 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, 25535560 + ... + 25535563.

It is an arithmetic number, because the mean of its divisors is an integer number (38303343).

Almost surely, 2^102142246 is an apocalyptic number.

102142246 is a deficient number, since it is larger than the sum of its proper divisors (51071126).

102142246 is an equidigital number, since it uses as much as digits as its factorization.

102142246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51071125.

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

The square root of 102142246 is about 10106.5447112255. The cubic root of 102142246 is about 467.4499680508.

Adding to 102142246 its reverse (642241201), we get a palindrome (744383447).

The spelling of 102142246 in words is "one hundred two million, one hundred forty-two thousand, two hundred forty-six".