1225808 has 20 divisors (see below), whose sum is σ = 2479008. Its totient is φ = 586080.

The previous prime is 1225787. The next prime is 1225817. The reversal of 1225808 is 8085221.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1298 + ... + 2033.

2^1225808 is an apocalyptic number.

It is an amenable number.

1225808 is an abundant number, since it is smaller than the sum of its proper divisors (1253200).

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

1225808 is a wasteful number, since it uses less digits than its factorization.

1225808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362 (or 3356 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 1225808 is about 1107.1621380810. The cubic root of 1225808 is about 107.0222680530.

The spelling of 1225808 in words is "one million, two hundred twenty-five thousand, eight hundred eight".