102242142 has 16 divisors (see below), whose sum is σ = 227204880. Its totient is φ = 34080696.

The previous prime is 102242099. The next prime is 102242143. The reversal of 102242142 is 241242201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946633 + ... + 946740.

It is an arithmetic number, because the mean of its divisors is an integer number (14200305).

Almost surely, 2^102242142 is an apocalyptic number.

102242142 is an abundant number, since it is smaller than the sum of its proper divisors (124962738).

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

102242142 is a wasteful number, since it uses less digits than its factorization.

102242142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893384 (or 1893378 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 102242142 is about 10111.4856475199. The cubic root of 102242142 is about 467.6023084354.

Adding to 102242142 its reverse (241242201), we get a palindrome (343484343).

The spelling of 102242142 in words is "one hundred two million, two hundred forty-two thousand, one hundred forty-two".