400600225 has 9 divisors (see below), whose sum is σ = 496868403. Its totient is φ = 320400120.

The previous prime is 400600219. The next prime is 400600253. The reversal of 400600225 is 522006004.

The square root of 400600225 is 20015.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 144216081 + 256384144 = 12009^2 + 16012^2 .

It is not a de Polignac number, because 400600225 - 2⁷ = 400600097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 98074 + ... + 102076.

Almost surely, 2^400600225 is an apocalyptic number.

400600225 is the 20015-th square number.

400600225 is the 10008-th centered octagonal number.

It is an amenable number.

400600225 is a deficient number, since it is larger than the sum of its proper divisors (96268178).

400600225 is an frugal number, since it uses more digits than its factorization.

400600225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8016 (or 4008 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The cubic root of 400600225 is about 737.1746568429.

Adding to 400600225 its reverse (522006004), we get a palindrome (922606229).

It can be divided in two parts, 400 and 600225, that added together give a square (600625 = 775²).

The spelling of 400600225 in words is "four hundred million, six hundred thousand, two hundred twenty-five".