1121225 has 24 divisors (see below), whose sum is σ = 1636800. Its totient is φ = 745920.

The previous prime is 1121221. The next prime is 1121231. The reversal of 1121225 is 5221211.

1121225 = 140² + 141² + ... + 182².

It is not a de Polignac number, because 1121225 - 2² = 1121221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7451 + ... + 7599.

It is an arithmetic number, because the mean of its divisors is an integer number (68200).

2^1121225 is an apocalyptic number.

It is an amenable number.

1121225 is a deficient number, since it is larger than the sum of its proper divisors (515575).

1121225 is a wasteful number, since it uses less digits than its factorization.

1121225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 204 counting only the distinct ones).

The product of its digits is 40, while the sum is 14.

The square root of 1121225 is about 1058.8791243574. The cubic root of 1121225 is about 103.8877301777.

Subtracting from 1121225 its sum of digits (14), we obtain a palindrome (1121211).

Adding to 1121225 its reverse (5221211), we get a palindrome (6342436).

The spelling of 1121225 in words is "one million, one hundred twenty-one thousand, two hundred twenty-five".