1224244445 has 4 divisors (see below), whose sum is σ = 1469093340. Its totient is φ = 979395552.

The previous prime is 1224244433. The next prime is 1224244457. The reversal of 1224244445 is 5444424221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5444424221 = 67 ⋅81260063.

It is an interprime number because it is at equal distance from previous prime (1224244433) and next prime (1224244457).

It can be written as a sum of positive squares in 2 ways, for example, as 537961636 + 686282809 = 23194^2 + 26197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224244445 - 2⁶ = 1224244381 is a prime.

It is a super-2 number, since 2×1224244445² = 2997548922226716050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122424440 + ... + 122424449.

It is an arithmetic number, because the mean of its divisors is an integer number (367273335).

Almost surely, 2^1224244445 is an apocalyptic number.

It is an amenable number.

1224244445 is a deficient number, since it is larger than the sum of its proper divisors (244848895).

1224244445 is an equidigital number, since it uses as much as digits as its factorization.

1224244445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244848894.

The product of its digits is 40960, while the sum is 32.

The square root of 1224244445 is about 34989.2046923047. The cubic root of 1224244445 is about 1069.7674531756.

Adding to 1224244445 its reverse (5444424221), we get a palindrome (6668668666).

The spelling of 1224244445 in words is "one billion, two hundred twenty-four million, two hundred forty-four thousand, four hundred forty-five".