1257263543492 has 12 divisors (see below), whose sum is σ = 2400230401296. Its totient is φ = 571483428840.

The previous prime is 1257263543479. The next prime is 1257263543579. The reversal of 1257263543492 is 2943453627521.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14287085678 + ... + 14287085765.

It is an arithmetic number, because the mean of its divisors is an integer number (200019200108).

Almost surely, 2^{1257263543492} is an apocalyptic number.

It is an amenable number.

1257263543492 is a deficient number, since it is larger than the sum of its proper divisors (1142966857804).

1257263543492 is a wasteful number, since it uses less digits than its factorization.

1257263543492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28574171458 (or 28574171456 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 53.

The spelling of 1257263543492 in words is "one trillion, two hundred fifty-seven billion, two hundred sixty-three million, five hundred forty-three thousand, four hundred ninety-two".