1287453043857 has 16 divisors (see below), whose sum is σ = 1726970802048. Its totient is φ = 853121210880.

The previous prime is 1287453043853. The next prime is 1287453043859. The reversal of 1287453043857 is 7583403547821.

It is a happy number.

It is not a de Polignac number, because 1287453043857 - 2² = 1287453043853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1287453043797 and 1287453043806.

It is not an unprimeable number, because it can be changed into a prime (1287453043853) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1712673 + ... + 2346945.

It is an arithmetic number, because the mean of its divisors is an integer number (107935675128).

Almost surely, 2^{1287453043857} is an apocalyptic number.

It is an amenable number.

1287453043857 is a deficient number, since it is larger than the sum of its proper divisors (439517758191).

1287453043857 is a wasteful number, since it uses less digits than its factorization.

1287453043857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638360.

The product of its (nonzero) digits is 22579200, while the sum is 57.

The spelling of 1287453043857 in words is "one trillion, two hundred eighty-seven billion, four hundred fifty-three million, forty-three thousand, eight hundred fifty-seven".