405522125 has 16 divisors (see below), whose sum is σ = 509511600. Its totient is φ = 322225600.

The previous prime is 405522101. The next prime is 405522151. The reversal of 405522125 is 521225504.

It can be written as a sum of positive squares in 8 ways, for example, as 297424516 + 108097609 = 17246^2 + 10397^2 .

It is not a de Polignac number, because 405522125 - 2⁸ = 405521869 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 405522094 and 405522103.

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, 7739 + ... + 29511.

It is an arithmetic number, because the mean of its divisors is an integer number (31844475).

Almost surely, 2^405522125 is an apocalyptic number.

It is an amenable number.

405522125 is a deficient number, since it is larger than the sum of its proper divisors (103989475).

405522125 is a wasteful number, since it uses less digits than its factorization.

405522125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21937 (or 21927 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 405522125 is about 20137.5799191462. The cubic root of 405522125 is about 740.1814292180.

Adding to 405522125 its reverse (521225504), we get a palindrome (926747629).

The spelling of 405522125 in words is "four hundred five million, five hundred twenty-two thousand, one hundred twenty-five".