1144721560 has 64 divisors (see below), whose sum is σ = 2654143200. Its totient is φ = 444128256.

The previous prime is 1144721551. The next prime is 1144721561. The reversal of 1144721560 is 651274411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144721561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185647 + ... + 191713.

Almost surely, 2^1144721560 is an apocalyptic number.

1144721560 is a gapful number since it is divisible by the number (10) 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 1144721560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327071600).

1144721560 is an abundant number, since it is smaller than the sum of its proper divisors (1509421640).

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

1144721560 is a wasteful number, since it uses less digits than its factorization.

1144721560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6220 (or 6216 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1144721560 is about 33833.7340534562. The cubic root of 1144721560 is about 1046.0841476223.

Adding to 1144721560 its reverse (651274411), we get a palindrome (1795995971).

The spelling of 1144721560 in words is "one billion, one hundred forty-four million, seven hundred twenty-one thousand, five hundred sixty".