405020225 has 24 divisors (see below), whose sum is σ = 536281152. Its totient is φ = 302702400.

The previous prime is 405020183. The next prime is 405020233. The reversal of 405020225 is 522020504.

It is not a de Polignac number, because 405020225 - 2¹⁰ = 405019201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405020197 and 405020206.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16535 + ... + 32915.

It is an arithmetic number, because the mean of its divisors is an integer number (22345048).

Almost surely, 2^405020225 is an apocalyptic number.

It is an amenable number.

405020225 is a deficient number, since it is larger than the sum of its proper divisors (131260927).

405020225 is a wasteful number, since it uses less digits than its factorization.

405020225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16457 (or 16452 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 405020225 is about 20125.1142853898. The cubic root of 405020225 is about 739.8759379310.

Adding to 405020225 its reverse (522020504), we get a palindrome (927040729).

The spelling of 405020225 in words is "four hundred five million, twenty thousand, two hundred twenty-five".