102321306 has 20 divisors (see below), whose sum is σ = 229275882. Its totient is φ = 34107048.

The previous prime is 102321301. The next prime is 102321311. The reversal of 102321306 is 603123201.

It is an interprime number because it is at equal distance from previous prime (102321301) and next prime (102321311).

It can be written as a sum of positive squares in only one way, i.e., 80838081 + 21483225 = 8991^2 + 4635^2 .

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 (102321301) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 315645 + ... + 315968.

Almost surely, 2^102321306 is an apocalyptic number.

102321306 is an abundant number, since it is smaller than the sum of its proper divisors (126954576).

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

102321306 is an equidigital number, since it uses as much as digits as its factorization.

102321306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631627 (or 631618 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 102321306 is about 10115.3994483658. The cubic root of 102321306 is about 467.7229622696.

Adding to 102321306 its reverse (603123201), we get a palindrome (705444507).

The spelling of 102321306 in words is "one hundred two million, three hundred twenty-one thousand, three hundred six".