1224425 has 24 divisors (see below), whose sum is σ = 1669536. Its totient is φ = 887040.

The previous prime is 1224413. The next prime is 1224437. The reversal of 1224425 is 5244221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1224413) and next prime (1224437).

It is not a de Polignac number, because 1224425 - 2⁸ = 1224169 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1224397 and 1224406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18242 + ... + 18308.

It is an arithmetic number, because the mean of its divisors is an integer number (69564).

2^1224425 is an apocalyptic number.

It is an amenable number.

1224425 is a deficient number, since it is larger than the sum of its proper divisors (445111).

1224425 is a wasteful number, since it uses less digits than its factorization.

1224425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 132 counting only the distinct ones).

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

The square root of 1224425 is about 1106.5373920478. The cubic root of 1224425 is about 106.9820041357.

Adding to 1224425 its reverse (5244221), we get a palindrome (6468646).

The spelling of 1224425 in words is "one million, two hundred twenty-four thousand, four hundred twenty-five".