1242224 has 20 divisors (see below), whose sum is σ = 2548944. Its totient is φ = 584448.

The previous prime is 1242221. The next prime is 1242233. The reversal of 1242224 is 4222421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242221) 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, 2012 + ... + 2555.

2^1242224 is an apocalyptic number.

It is an amenable number.

1242224 is an abundant number, since it is smaller than the sum of its proper divisors (1306720).

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

1242224 is a wasteful number, since it uses less digits than its factorization.

1242224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592 (or 4586 counting only the distinct ones).

The product of its digits is 256, while the sum is 17.

The square root of 1242224 is about 1114.5510306846. The cubic root of 1242224 is about 107.4978979218.

Adding to 1242224 its reverse (4222421), we get a palindrome (5464645).

The spelling of 1242224 in words is "one million, two hundred forty-two thousand, two hundred twenty-four".