102021384 has 64 divisors (see below), whose sum is σ = 262152000. Its totient is φ = 33073920.

The previous prime is 102021329. The next prime is 102021389. The reversal of 102021384 is 483120201.

It is a self number, because there is not a number n which added to its sum of digits gives 102021384.

It is not an unprimeable number, because it can be changed into a prime (102021389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154014 + ... + 154674.

It is an arithmetic number, because the mean of its divisors is an integer number (4096125).

Almost surely, 2^102021384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102021384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131076000).

102021384 is an abundant number, since it is smaller than the sum of its proper divisors (160130616).

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

102021384 is a wasteful number, since it uses less digits than its factorization.

102021384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 102021384 is about 10100.5635486343. The cubic root of 102021384 is about 467.2655218866.

Adding to 102021384 its reverse (483120201), we get a palindrome (585141585).

The spelling of 102021384 in words is "one hundred two million, twenty-one thousand, three hundred eighty-four".