102405205 has 16 divisors (see below), whose sum is σ = 140609664. Its totient is φ = 70136640.

The previous prime is 102405181. The next prime is 102405271. The reversal of 102405205 is 502504201.

It is not a de Polignac number, because 102405205 - 2⁷ = 102405077 is a prime.

It is a super-2 number, since 2×102405205² = 20973652022184050, which contains 22 as substring.

It is a Duffinian number.

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, 46990 + ... + 49120.

It is an arithmetic number, because the mean of its divisors is an integer number (8788104).

Almost surely, 2^102405205 is an apocalyptic number.

It is an amenable number.

102405205 is a deficient number, since it is larger than the sum of its proper divisors (38204459).

102405205 is a wasteful number, since it uses less digits than its factorization.

102405205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 102405205 is about 10119.5456913836. The cubic root of 102405205 is about 467.8507648091.

Adding to 102405205 its reverse (502504201), we get a palindrome (604909406).

The spelling of 102405205 in words is "one hundred two million, four hundred five thousand, two hundred five".