102123420 has 96 divisors (see below), whose sum is σ = 346042368. Its totient is φ = 21967872.

The previous prime is 102123407. The next prime is 102123451. The reversal of 102123420 is 24321201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 102123420.

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 31 ways as a sum of consecutive naturals, for example, 12 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (3604608).

Almost surely, 2^102123420 is an apocalyptic number.

102123420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102123420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173021184).

102123420 is an abundant number, since it is smaller than the sum of its proper divisors (243918948).

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

102123420 is a wasteful number, since it uses less digits than its factorization.

102123420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14339 (or 14337 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 102123420 is about 10105.6132916315. The cubic root of 102123420 is about 467.4212474702.

Adding to 102123420 its reverse (24321201), we get a palindrome (126444621).

The spelling of 102123420 in words is "one hundred two million, one hundred twenty-three thousand, four hundred twenty".