1225424 has 40 divisors (see below), whose sum is σ = 2604000. Its totient is φ = 556416.

The previous prime is 1225409. The next prime is 1225459. The reversal of 1225424 is 4245221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1225396 and 1225405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8747 + ... + 8885.

It is an arithmetic number, because the mean of its divisors is an integer number (65100).

2^1225424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302000).

1225424 is an abundant number, since it is smaller than the sum of its proper divisors (1378576).

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

1225424 is a wasteful number, since it uses less digits than its factorization.

1225424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 189 counting only the distinct ones).

The product of its digits is 640, while the sum is 20.

The square root of 1225424 is about 1106.9887081628. The cubic root of 1225424 is about 107.0110915221.

The spelling of 1225424 in words is "one million, two hundred twenty-five thousand, four hundred twenty-four".