405423125 has 10 divisors (see below), whose sum is σ = 506617518. Its totient is φ = 324338000.

The previous prime is 405423113. The next prime is 405423169. The reversal of 405423125 is 521324504.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 258116356 + 147306769 = 16066^2 + 12137^2 .

It is not a de Polignac number, because 405423125 - 2¹⁸ = 405160981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405423094 and 405423103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 323714 + ... + 324963.

Almost surely, 2^405423125 is an apocalyptic number.

It is an amenable number.

405423125 is a deficient number, since it is larger than the sum of its proper divisors (101194393).

405423125 is an frugal number, since it uses more digits than its factorization.

405423125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648697 (or 648682 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 405423125 is about 20135.1216783013. The cubic root of 405423125 is about 740.1211908891.

Adding to 405423125 its reverse (521324504), we get a palindrome (926747629).

The spelling of 405423125 in words is "four hundred five million, four hundred twenty-three thousand, one hundred twenty-five".