102420012 has 24 divisors (see below), whose sum is σ = 249371136. Its totient is φ = 32655568.

The previous prime is 102419987. The next prime is 102420061. The reversal of 102420012 is 210024201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 102420012.

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 7 ways as a sum of consecutive naturals, for example, 185268 + ... + 185819.

It is an arithmetic number, because the mean of its divisors is an integer number (10390464).

Almost surely, 2^102420012 is an apocalyptic number.

102420012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102420012 is an abundant number, since it is smaller than the sum of its proper divisors (146951124).

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

102420012 is a wasteful number, since it uses less digits than its factorization.

102420012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371117 (or 371115 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 102420012 is about 10120.2772689289. The cubic root of 102420012 is about 467.8733129221.

Adding to 102420012 its reverse (210024201), we get a palindrome (312444213).

The spelling of 102420012 in words is "one hundred two million, four hundred twenty thousand, twelve".