1225128 has 16 divisors (see below), whose sum is σ = 3062880. Its totient is φ = 408368.

The previous prime is 1225127. The next prime is 1225129. The reversal of 1225128 is 8215221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1225127) and next prime (1225129).

It is not an unprimeable number, because it can be changed into a prime (1225123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25500 + ... + 25547.

It is an arithmetic number, because the mean of its divisors is an integer number (191430).

2^1225128 is an apocalyptic number.

It is an amenable number.

1225128 is an abundant number, since it is smaller than the sum of its proper divisors (1837752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225128 is a wasteful number, since it uses less digits than its factorization.

1225128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51056 (or 51052 counting only the distinct ones).

The product of its digits is 320, while the sum is 21.

The square root of 1225128 is about 1106.8550040543. The cubic root of 1225128 is about 107.0024746858.

The spelling of 1225128 in words is "one million, two hundred twenty-five thousand, one hundred twenty-eight".