400225 has 12 divisors (see below), whose sum is σ = 567424. Its totient is φ = 274320.

The previous prime is 400217. The next prime is 400237. The reversal of 400225 is 522004.

It is a happy number.

It is not a de Polignac number, because 400225 - 2³ = 400217 is a prime.

It is a Duffinian number.

400225 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 969 + ... + 1318.

2⁴⁰⁰²²⁵ is an apocalyptic number.

It is an amenable number.

400225 is a deficient number, since it is larger than the sum of its proper divisors (167199).

400225 is a wasteful number, since it uses less digits than its factorization.

400225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304 (or 2299 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 400225 is about 632.6333851450. The cubic root of 400225 is about 73.6944425014.

Adding to 400225 its reverse (522004), we get a palindrome (922229).

It can be divided in two parts, 400 and 225, that multiplied together give a square (90000 = 300²).

The spelling of 400225 in words is "four hundred thousand, two hundred twenty-five".