1244025213440 has 160 divisors (see below), whose sum is σ = 3028785542640. Its totient is φ = 489952641024.

The previous prime is 1244025213439. The next prime is 1244025213463. The reversal of 1244025213440 is 443125204421.

It can be written as a sum of positive squares in 8 ways, for example, as 204636807424 + 1039388406016 = 452368^2 + 1019504^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1244025213397 and 1244025213406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115299566 + ... + 115310354.

Almost surely, 2^{1244025213440} is an apocalyptic number.

1244025213440 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 1244025213440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1514392771320).

1244025213440 is an abundant number, since it is smaller than the sum of its proper divisors (1784760329200).

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

1244025213440 is an equidigital number, since it uses as much as digits as its factorization.

1244025213440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11502 (or 11486 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

The spelling of 1244025213440 in words is "one trillion, two hundred forty-four billion, twenty-five million, two hundred thirteen thousand, four hundred forty".