1287745057 has 8 divisors (see below), whose sum is σ = 1316448000. Its totient is φ = 1259096544.

The previous prime is 1287745013. The next prime is 1287745073. The reversal of 1287745057 is 7505477821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1287745057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1287744998 and 1287745016.

It is not an unprimeable number, because it can be changed into a prime (1287745357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36244 + ... + 62362.

It is an arithmetic number, because the mean of its divisors is an integer number (164556000).

Almost surely, 2^1287745057 is an apocalyptic number.

It is an amenable number.

1287745057 is a deficient number, since it is larger than the sum of its proper divisors (28702943).

1287745057 is a wasteful number, since it uses less digits than its factorization.

1287745057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27215.

The product of its (nonzero) digits is 548800, while the sum is 46.

The square root of 1287745057 is about 35885.1648595907. The cubic root of 1287745057 is about 1087.9525735459.

The spelling of 1287745057 in words is "one billion, two hundred eighty-seven million, seven hundred forty-five thousand, fifty-seven".