1243257456772 has 24 divisors (see below), whose sum is σ = 2290260321440. Its totient is φ = 588898771200.

The previous prime is 1243257456769. The next prime is 1243257456797. The reversal of 1243257456772 is 2776547523421.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4047103 + ... + 4343449.

Almost surely, 2^{1243257456772} is an apocalyptic number.

It is an amenable number.

1243257456772 is a deficient number, since it is larger than the sum of its proper divisors (1047002864668).

1243257456772 is a wasteful number, since it uses less digits than its factorization.

1243257456772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351571 (or 351569 counting only the distinct ones).

The product of its digits is 19756800, while the sum is 55.

The spelling of 1243257456772 in words is "one trillion, two hundred forty-three billion, two hundred fifty-seven million, four hundred fifty-six thousand, seven hundred seventy-two".