102321612 has 72 divisors (see below), whose sum is σ = 273873600. Its totient is φ = 32120928.

The previous prime is 102321587. The next prime is 102321619. The reversal of 102321612 is 216123201.

102321612 is a `hidden beast` number, since 10 + 23 + 21 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (102321619) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 154939 + ... + 155597.

It is an arithmetic number, because the mean of its divisors is an integer number (3803800).

Almost surely, 2^102321612 is an apocalyptic number.

102321612 is a gapful number since it is divisible by the number (12) 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 102321612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136936800).

102321612 is an abundant number, since it is smaller than the sum of its proper divisors (171551988).

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

102321612 is a wasteful number, since it uses less digits than its factorization.

102321612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 102321612 is about 10115.4145738076. The cubic root of 102321612 is about 467.7234285233.

Adding to 102321612 its reverse (216123201), we get a palindrome (318444813).

The spelling of 102321612 in words is "one hundred two million, three hundred twenty-one thousand, six hundred twelve".