1225812 has 24 divisors (see below), whose sum is σ = 3269056. Its totient is φ = 350208.

The previous prime is 1225787. The next prime is 1225817. The reversal of 1225812 is 2185221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7213 + ... + 7380.

2^1225812 is an apocalyptic number.

1225812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225812 is an abundant number, since it is smaller than the sum of its proper divisors (2043244).

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

1225812 is a wasteful number, since it uses less digits than its factorization.

1225812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14607 (or 14605 counting only the distinct ones).

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

The square root of 1225812 is about 1107.1639444996. The cubic root of 1225812 is about 107.0223844629.

The spelling of 1225812 in words is "one million, two hundred twenty-five thousand, eight hundred twelve".