102112405 has 8 divisors (see below), whose sum is σ = 122650200. Its totient is φ = 81613056.

The previous prime is 102112379. The next prime is 102112429. The reversal of 102112405 is 504211201.

It can be written as a sum of positive squares in 4 ways, for example, as 10125124 + 91987281 = 3182^2 + 9591^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102112405 - 2¹¹ = 102110357 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3400 + ... + 14689.

It is an arithmetic number, because the mean of its divisors is an integer number (15331275).

Almost surely, 2^102112405 is an apocalyptic number.

It is an amenable number.

102112405 is a deficient number, since it is larger than the sum of its proper divisors (20537795).

102112405 is a wasteful number, since it uses less digits than its factorization.

102112405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19223.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 102112405 is about 10105.0682827975. The cubic root of 102112405 is about 467.4044415630.

Adding to 102112405 its reverse (504211201), we get a palindrome (606323606).

The spelling of 102112405 in words is "one hundred two million, one hundred twelve thousand, four hundred five".