1243504128456 has 96 divisors (see below), whose sum is σ = 3532438765440. Its totient is φ = 394717774464.

The previous prime is 1243504128403. The next prime is 1243504128469. The reversal of 1243504128456 is 6548214053421.

1243504128456 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 504 + 12 + 84 + 56 = 666.

It is a super-2 number, since 2×1243504128456² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4840546 + ... + 5090961.

It is an arithmetic number, because the mean of its divisors is an integer number (36796237140).

Almost surely, 2^{1243504128456} is an apocalyptic number.

It is an amenable number.

1243504128456 is an abundant number, since it is smaller than the sum of its proper divisors (2288934636984).

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

1243504128456 is a wasteful number, since it uses less digits than its factorization.

1243504128456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931603 (or 9931596 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 1243504128456 in words is "one trillion, two hundred forty-three billion, five hundred four million, one hundred twenty-eight thousand, four hundred fifty-six".