102342420 has 48 divisors (see below), whose sum is σ = 318400320. Its totient is φ = 27291168.

The previous prime is 102342419. The next prime is 102342463. The reversal of 102342420 is 24243201.

102342420 is a `hidden beast` number, since 10 + 234 + 2 + 420 = 666.

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 = 102342393 and 102342402.

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 15 ways as a sum of consecutive naturals, for example, 94222 + ... + 95301.

It is an arithmetic number, because the mean of its divisors is an integer number (6633340).

Almost surely, 2^102342420 is an apocalyptic number.

102342420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102342420 is an abundant number, since it is smaller than the sum of its proper divisors (216057900).

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

102342420 is a wasteful number, since it uses less digits than its factorization.

102342420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189541 (or 189533 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 102342420 is about 10116.4430507961. The cubic root of 102342420 is about 467.7551315991.

Adding to 102342420 its reverse (24243201), we get a palindrome (126585621).

The spelling of 102342420 in words is "one hundred two million, three hundred forty-two thousand, four hundred twenty".