102405630 has 32 divisors (see below), whose sum is σ = 258710400. Its totient is φ = 25870752.

The previous prime is 102405629. The next prime is 102405701. The reversal of 102405630 is 36504201.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102405597 and 102405606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89260 + ... + 90399.

It is an arithmetic number, because the mean of its divisors is an integer number (8084700).

Almost surely, 2^102405630 is an apocalyptic number.

102405630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102405630 is an abundant number, since it is smaller than the sum of its proper divisors (156304770).

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

102405630 is a wasteful number, since it uses less digits than its factorization.

102405630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179688.

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

The square root of 102405630 is about 10119.5666903282. The cubic root of 102405630 is about 467.8514120298.

Adding to 102405630 its reverse (36504201), we get a palindrome (138909831).

The spelling of 102405630 in words is "one hundred two million, four hundred five thousand, six hundred thirty".