102421224 has 48 divisors (see below), whose sum is σ = 278678400. Its totient is φ = 33981984.

The previous prime is 102421223. The next prime is 102421237. The reversal of 102421224 is 422124201.

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

It is a junction number, because it is equal to n+sod(n) for n = 102421197 and 102421206.

It is not an unprimeable number, because it can be changed into a prime (102421223) 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 11 ways as a sum of consecutive naturals, for example, 12867 + ... + 19245.

It is an arithmetic number, because the mean of its divisors is an integer number (5805800).

Almost surely, 2^102421224 is an apocalyptic number.

It is an amenable number.

102421224 is an abundant number, since it is smaller than the sum of its proper divisors (176257176).

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

102421224 is a wasteful number, since it uses less digits than its factorization.

102421224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6614 (or 6607 counting only the distinct ones).

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

The square root of 102421224 is about 10120.3371485341. The cubic root of 102421224 is about 467.8751584606.

Adding to 102421224 its reverse (422124201), we get a palindrome (524545425).

The spelling of 102421224 in words is "one hundred two million, four hundred twenty-one thousand, two hundred twenty-four".