1245444000000 has 252 divisors, whose sum is σ = 4143358526832. Its totient is φ = 332115200000.

The previous prime is 1245443999941. The next prime is 1245444000011. The reversal of 1245444000000 is 4445421.

It is a happy number.

It is a super-2 number, since 2×1245444000000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 11948107 + ... + 12051893.

It is an arithmetic number, because the mean of its divisors is an integer number (16441898916).

Almost surely, 2^{1245444000000} is an apocalyptic number.

1245444000000 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 1245444000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2071679263416).

1245444000000 is an abundant number, since it is smaller than the sum of its proper divisors (2897914526832).

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

1245444000000 is an frugal number, since it uses more digits than its factorization.

1245444000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103836 (or 103797 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 1245444000000 its reverse (4445421), we get a palindrome (1245448445421).

The spelling of 1245444000000 in words is "one trillion, two hundred forty-five billion, four hundred forty-four million", and thus it is an aban number.