102640530 has 64 divisors (see below), whose sum is σ = 253393920. Its totient is φ = 26598336.

The previous prime is 102640523. The next prime is 102640561. The reversal of 102640530 is 35046201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102640497 and 102640506.

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, 182029 + ... + 182591.

It is an arithmetic number, because the mean of its divisors is an integer number (3959280).

Almost surely, 2^102640530 is an apocalyptic number.

102640530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102640530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126696960).

102640530 is an abundant number, since it is smaller than the sum of its proper divisors (150753390).

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

102640530 is a wasteful number, since it uses less digits than its factorization.

102640530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 102640530 is about 10131.1662704745. The cubic root of 102640530 is about 468.2088610446.

Adding to 102640530 its reverse (35046201), we get a palindrome (137686731).

The spelling of 102640530 in words is "one hundred two million, six hundred forty thousand, five hundred thirty".