1247244406272 has 240 divisors, whose sum is σ = 3977092548000. Its totient is φ = 374279110656.

The previous prime is 1247244406211. The next prime is 1247244406273. The reversal of 1247244406272 is 2726044427421.

1247244406272 is a `hidden beast` number, since 1 + 247 + 244 + 40 + 62 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247244406273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1455604 + ... + 2147852.

It is an arithmetic number, because the mean of its divisors is an integer number (16571218950).

Almost surely, 2^{1247244406272} is an apocalyptic number.

1247244406272 is a gapful number since it is divisible by the number (12) 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 1247244406272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1988546274000).

1247244406272 is an abundant number, since it is smaller than the sum of its proper divisors (2729848141728).

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

1247244406272 is a wasteful number, since it uses less digits than its factorization.

1247244406272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692313 (or 692294 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 45.

The spelling of 1247244406272 in words is "one trillion, two hundred forty-seven billion, two hundred forty-four million, four hundred six thousand, two hundred seventy-two".