1224613 has 4 divisors (see below), whose sum is σ = 1318828. Its totient is φ = 1130400.

The previous prime is 1224599. The next prime is 1224637. The reversal of 1224613 is 3164221.

1224613 = 782² + 783².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 613089 + 611524 = 783^2 + 782^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224613 - 2¹³ = 1216421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224673) 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, 47088 + ... + 47113.

It is an arithmetic number, because the mean of its divisors is an integer number (329707).

2^1224613 is an apocalyptic number.

1224613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1224613 is the 783-rd centered square number.

It is an amenable number.

1224613 is a deficient number, since it is larger than the sum of its proper divisors (94215).

1224613 is an equidigital number, since it uses as much as digits as its factorization.

1224613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94214.

The product of its digits is 288, while the sum is 19.

The square root of 1224613 is about 1106.6223384696. The cubic root of 1224613 is about 106.9874792465.

Adding to 1224613 its reverse (3164221), we get a palindrome (4388834).

The spelling of 1224613 in words is "one million, two hundred twenty-four thousand, six hundred thirteen".