1244127276420 has 144 divisors (see below), whose sum is σ = 4053663673920. Its totient is φ = 284276272896.

The previous prime is 1244127276389. The next prime is 1244127276421. The reversal of 1244127276420 is 246727214421.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1244127276421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8859111 + ... + 8998449.

It is an arithmetic number, because the mean of its divisors is an integer number (28150442180).

Almost surely, 2^{1244127276420} is an apocalyptic number.

1244127276420 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 1244127276420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026831836960).

1244127276420 is an abundant number, since it is smaller than the sum of its proper divisors (2809536397500).

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

1244127276420 is a wasteful number, since it uses less digits than its factorization.

1244127276420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142402 (or 142393 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 42.

The spelling of 1244127276420 in words is "one trillion, two hundred forty-four billion, one hundred twenty-seven million, two hundred seventy-six thousand, four hundred twenty".