406321225 has 6 divisors (see below), whose sum is σ = 503838350. Its totient is φ = 325056960.

The previous prime is 406321217. The next prime is 406321241. The reversal of 406321225 is 522123604.

It can be written as a sum of positive squares in 3 ways, for example, as 71723961 + 334597264 = 8469^2 + 18292^2 .

It is not a de Polignac number, because 406321225 - 2³ = 406321217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 16252849 = 406321225 / (4 + 0 + 6 + 3 + 2 + 1 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 406321225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8126400 + ... + 8126449.

Almost surely, 2^406321225 is an apocalyptic number.

It is an amenable number.

406321225 is a deficient number, since it is larger than the sum of its proper divisors (97517125).

406321225 is a wasteful number, since it uses less digits than its factorization.

406321225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16252859 (or 16252854 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 406321225 is about 20157.4111681039. The cubic root of 406321225 is about 740.6672973998.

Adding to 406321225 its reverse (522123604), we get a palindrome (928444829).

The spelling of 406321225 in words is "four hundred six million, three hundred twenty-one thousand, two hundred twenty-five".