405015025 has 12 divisors (see below), whose sum is σ = 503719372. Its totient is φ = 323043840.

The previous prime is 405015019. The next prime is 405015071. The reversal of 405015025 is 520510504.

It can be written as a sum of positive squares in 6 ways, for example, as 4734976 + 400280049 = 2176^2 + 20007^2 .

It is not a de Polignac number, because 405015025 - 2⁵ = 405014993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405014987 and 405015005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15612 + ... + 32461.

Almost surely, 2^405015025 is an apocalyptic number.

It is an amenable number.

405015025 is a deficient number, since it is larger than the sum of its proper divisors (98704347).

405015025 is a wasteful number, since it uses less digits than its factorization.

405015025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48420 (or 48415 counting only the distinct ones).

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

The square root of 405015025 is about 20124.9850931622. The cubic root of 405015025 is about 739.8727715283.

Adding to 405015025 its reverse (520510504), we get a palindrome (925525529).

The spelling of 405015025 in words is "four hundred five million, fifteen thousand, twenty-five".