1213225 has 12 divisors (see below), whose sum is σ = 1620556. Its totient is φ = 895680.

The previous prime is 1213213. The next prime is 1213241. The reversal of 1213225 is 5223121.

It can be written as a sum of positive squares in 6 ways, for example, as 114921 + 1098304 = 339^2 + 1048^2 .

It is not a de Polignac number, because 1213225 - 2⁷ = 1213097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213199 and 1213208.

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, 1542 + ... + 2191.

2^1213225 is an apocalyptic number.

It is an amenable number.

1213225 is a deficient number, since it is larger than the sum of its proper divisors (407331).

1213225 is a wasteful number, since it uses less digits than its factorization.

1213225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756 (or 3751 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 1213225 is about 1101.4649336225. The cubic root of 1213225 is about 106.6548109653.

Adding to 1213225 its reverse (5223121), we get a palindrome (6436346).

The spelling of 1213225 in words is "one million, two hundred thirteen thousand, two hundred twenty-five".