405025 has 12 divisors (see below), whose sum is σ = 532332. Its totient is φ = 304640.

The previous prime is 405011. The next prime is 405029. The reversal of 405025 is 520504.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 529 + 404496 = 23^2 + 636^2 .

It is not a de Polignac number, because 405025 - 2⁹ = 404513 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (405029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52 + ... + 901.

It is an arithmetic number, because the mean of its divisors is an integer number (44361).

2⁴⁰⁵⁰²⁵ is an apocalyptic number.

It is an amenable number.

405025 is a deficient number, since it is larger than the sum of its proper divisors (127307).

405025 is a wasteful number, since it uses less digits than its factorization.

405025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 405025 is about 636.4157446198. The cubic root of 405025 is about 73.9878845517.

Adding to 405025 its reverse (520504), we get a palindrome (925529).

The spelling of 405025 in words is "four hundred five thousand, twenty-five".