1224147 has 4 divisors (see below), whose sum is σ = 1632200. Its totient is φ = 816096.

The previous prime is 1224133. The next prime is 1224149. The reversal of 1224147 is 7414221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7414221 = 3 ⋅2471407.

It is not a de Polignac number, because 1224147 - 2⁴ = 1224131 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224149) 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, 204022 + ... + 204027.

It is an arithmetic number, because the mean of its divisors is an integer number (408050).

2^1224147 is an apocalyptic number.

1224147 is a deficient number, since it is larger than the sum of its proper divisors (408053).

1224147 is an equidigital number, since it uses as much as digits as its factorization.

1224147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408052.

The product of its digits is 448, while the sum is 21.

The square root of 1224147 is about 1106.4117678333. The cubic root of 1224147 is about 106.9739069341.

Adding to 1224147 its reverse (7414221), we get a palindrome (8638368).

The spelling of 1224147 in words is "one million, two hundred twenty-four thousand, one hundred forty-seven".