1224745 has 8 divisors (see below), whose sum is σ = 1475784. Its totient is φ = 975744.

The previous prime is 1224739. The next prime is 1224763. The reversal of 1224745 is 5474221.

It can be written as a sum of positive squares in 4 ways, for example, as 12544 + 1212201 = 112^2 + 1101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1224745 - 2⁹ = 1224233 is a prime.

It is a Duffinian 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, 1677 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (184473).

2^1224745 is an apocalyptic number.

It is an amenable number.

1224745 is a deficient number, since it is larger than the sum of its proper divisors (251039).

1224745 is an equidigital number, since it uses as much as digits as its factorization.

1224745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019.

The product of its digits is 2240, while the sum is 25.

The square root of 1224745 is about 1106.6819778057. The cubic root of 1224745 is about 106.9913231384.

Adding to 1224745 its reverse (5474221), we get a palindrome (6698966).

The spelling of 1224745 in words is "one million, two hundred twenty-four thousand, seven hundred forty-five".