205405124 has 24 divisors (see below), whose sum is σ = 380200800. Its totient is φ = 96828480.

The previous prime is 205405069. The next prime is 205405127. The reversal of 205405124 is 421504502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 205405124.

It is not an unprimeable number, because it can be changed into a prime (205405127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9632 + ... + 22440.

It is an arithmetic number, because the mean of its divisors is an integer number (15841700).

Almost surely, 2^205405124 is an apocalyptic number.

It is an amenable number.

205405124 is a deficient number, since it is larger than the sum of its proper divisors (174795676).

205405124 is a wasteful number, since it uses less digits than its factorization.

205405124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13043 (or 13041 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 205405124 is about 14331.9616242858. The cubic root of 205405124 is about 590.0250147395.

Adding to 205405124 its reverse (421504502), we get a palindrome (626909626).

The spelling of 205405124 in words is "two hundred five million, four hundred five thousand, one hundred twenty-four".