102421418 has 12 divisors (see below), whose sum is σ = 168868770. Its totient is φ = 46555080.

The previous prime is 102421411. The next prime is 102421453. The reversal of 102421418 is 814124201.

It can be written as a sum of positive squares in only one way, i.e., 55457809 + 46963609 = 7447^2 + 6853^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102421393 and 102421402.

It is not an unprimeable number, because it can be changed into a prime (102421411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211373 + ... + 211856.

Almost surely, 2^102421418 is an apocalyptic number.

102421418 is a deficient number, since it is larger than the sum of its proper divisors (66447352).

102421418 is a wasteful number, since it uses less digits than its factorization.

102421418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423253 (or 423242 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 102421418 is about 10120.3467331905. The cubic root of 102421418 is about 467.8754538672.

Adding to 102421418 its reverse (814124201), we get a palindrome (916545619).

The spelling of 102421418 in words is "one hundred two million, four hundred twenty-one thousand, four hundred eighteen".