1257286323872 has 96 divisors (see below), whose sum is σ = 2566521216000. Its totient is φ = 605824800768.

The previous prime is 1257286323829. The next prime is 1257286323899. The reversal of 1257286323872 is 2783236827521.

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, 52530404 + ... + 52554332.

It is an arithmetic number, because the mean of its divisors is an integer number (26734596000).

Almost surely, 2^{1257286323872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257286323872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1283260608000).

1257286323872 is an abundant number, since it is smaller than the sum of its proper divisors (1309234892128).

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

1257286323872 is a wasteful number, since it uses less digits than its factorization.

1257286323872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24398 (or 24390 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 56.

The spelling of 1257286323872 in words is "one trillion, two hundred fifty-seven billion, two hundred eighty-six million, three hundred twenty-three thousand, eight hundred seventy-two".