1244521040 has 160 divisors (see below), whose sum is σ = 3615197184. Its totient is φ = 388546560.

The previous prime is 1244521027. The next prime is 1244521063. The reversal of 1244521040 is 401254421.

It is a junction number, because it is equal to n+sod(n) for n = 1244520997 and 1244521015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 293012 + ... + 297228.

Almost surely, 2^1244521040 is an apocalyptic number.

1244521040 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 1244521040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1807598592).

1244521040 is an abundant number, since it is smaller than the sum of its proper divisors (2370676144).

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

1244521040 is a wasteful number, since it uses less digits than its factorization.

1244521040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4285 (or 4279 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1244521040 is about 35277.7697707777. The cubic root of 1244521040 is about 1075.6411650154.

Adding to 1244521040 its reverse (401254421), we get a palindrome (1645775461).

The spelling of 1244521040 in words is "one billion, two hundred forty-four million, five hundred twenty-one thousand, forty".