1244142501240 has 128 divisors (see below), whose sum is σ = 3877289856000. Its totient is φ = 318990432768.

The previous prime is 1244142501197. The next prime is 1244142501253. The reversal of 1244142501240 is 421052414421.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1244142501198 and 1244142501207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83787 + ... + 1579653.

It is an arithmetic number, because the mean of its divisors is an integer number (30291327000).

Almost surely, 2^{1244142501240} is an apocalyptic number.

1244142501240 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 1244142501240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1938644928000).

1244142501240 is an abundant number, since it is smaller than the sum of its proper divisors (2633147354760).

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

1244142501240 is a wasteful number, since it uses less digits than its factorization.

1244142501240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496149 (or 1496145 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

Adding to 1244142501240 its reverse (421052414421), we get a palindrome (1665194915661).

The spelling of 1244142501240 in words is "one trillion, two hundred forty-four billion, one hundred forty-two million, five hundred one thousand, two hundred forty".