1224545136 has 80 divisors (see below), whose sum is σ = 3437399040. Its totient is φ = 374215680.

The previous prime is 1224545123. The next prime is 1224545137. The reversal of 1224545136 is 6315454221.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1224545097 and 1224545106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224545137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6616 + ... + 49928.

It is an arithmetic number, because the mean of its divisors is an integer number (42967488).

Almost surely, 2^1224545136 is an apocalyptic number.

1224545136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1224545136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718699520).

1224545136 is an abundant number, since it is smaller than the sum of its proper divisors (2212853904).

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

1224545136 is a wasteful number, since it uses less digits than its factorization.

1224545136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43374 (or 43368 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 1224545136 is about 34993.5013395345. The cubic root of 1224545136 is about 1069.8550291262.

Adding to 1224545136 its reverse (6315454221), we get a palindrome (7539999357).

The spelling of 1224545136 in words is "one billion, two hundred twenty-four million, five hundred forty-five thousand, one hundred thirty-six".