102821424 has 40 divisors (see below), whose sum is σ = 270131520. Its totient is φ = 33691968.

The previous prime is 102821413. The next prime is 102821437. The reversal of 102821424 is 424128201.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 102821394 and 102821403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15322 + ... + 20985.

It is an arithmetic number, because the mean of its divisors is an integer number (6753288).

Almost surely, 2^102821424 is an apocalyptic number.

It is an amenable number.

102821424 is an abundant number, since it is smaller than the sum of its proper divisors (167310096).

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

102821424 is a wasteful number, since it uses less digits than its factorization.

102821424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36377 (or 36371 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 102821424 is about 10140.0899404295. The cubic root of 102821424 is about 468.4837572157.

Adding to 102821424 its reverse (424128201), we get a palindrome (526949625).

The spelling of 102821424 in words is "one hundred two million, eight hundred twenty-one thousand, four hundred twenty-four".