102421142 has 8 divisors (see below), whose sum is σ = 154216656. Its totient is φ = 51015592.

The previous prime is 102421133. The next prime is 102421159. The reversal of 102421142 is 241124201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 102421142.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 96833 + ... + 97884.

It is an arithmetic number, because the mean of its divisors is an integer number (19277082).

Almost surely, 2^102421142 is an apocalyptic number.

102421142 is a deficient number, since it is larger than the sum of its proper divisors (51795514).

102421142 is a wasteful number, since it uses less digits than its factorization.

102421142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194982.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 102421142 is about 10120.3330972849. Note that the first 3 decimals coincide. The cubic root of 102421142 is about 467.8750335979.

Adding to 102421142 its reverse (241124201), we get a palindrome (343545343).

The spelling of 102421142 in words is "one hundred two million, four hundred twenty-one thousand, one hundred forty-two".