102204405 has 24 divisors (see below), whose sum is σ = 180501048. Its totient is φ = 53479296.

The previous prime is 102204379. The next prime is 102204407. The reversal of 102204405 is 504402201.

102204405 is a `hidden beast` number, since 1 + 0 + 220 + 440 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 54552996 + 47651409 = 7386^2 + 6903^2 .

It is not a de Polignac number, because 102204405 - 2⁵ = 102204373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102204407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19042 + ... + 23811.

It is an arithmetic number, because the mean of its divisors is an integer number (7520877).

Almost surely, 2^102204405 is an apocalyptic number.

102204405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102204405 is a deficient number, since it is larger than the sum of its proper divisors (78296643).

102204405 is a wasteful number, since it uses less digits than its factorization.

102204405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42917 (or 42914 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 102204405 is about 10109.6194290389. The cubic root of 102204405 is about 467.5447715613.

Adding to 102204405 its reverse (504402201), we get a palindrome (606606606).

The spelling of 102204405 in words is "one hundred two million, two hundred four thousand, four hundred five".