405500125 has 8 divisors (see below), whose sum is σ = 506064312. Its totient is φ = 324400000.

The previous prime is 405500089. The next prime is 405500129. The reversal of 405500125 is 521005504.

It can be written as a sum of positive squares in 4 ways, for example, as 11437924 + 394062201 = 3382^2 + 19851^2 .

It is not a de Polignac number, because 405500125 - 2¹⁷ = 405369053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405500096 and 405500105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405500129) 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, 1621876 + ... + 1622125.

It is an arithmetic number, because the mean of its divisors is an integer number (63258039).

Almost surely, 2^405500125 is an apocalyptic number.

It is an amenable number.

405500125 is a deficient number, since it is larger than the sum of its proper divisors (100564187).

405500125 is an equidigital number, since it uses as much as digits as its factorization.

405500125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244016 (or 3244006 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 405500125 is about 20137.0336693367. The cubic root of 405500125 is about 740.1680437700.

Adding to 405500125 its reverse (521005504), we get a palindrome (926505629).

The spelling of 405500125 in words is "four hundred five million, five hundred thousand, one hundred twenty-five".