1257284413887 has 8 divisors (see below), whose sum is σ = 1676386344960. Its totient is φ = 838186046040.

The previous prime is 1257284413841. The next prime is 1257284413999. The reversal of 1257284413887 is 7883144827521.

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

It is not a de Polignac number, because 1257284413887 - 2¹⁴ = 1257284397503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1257284413887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257284415887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85314 + ... + 1588032.

It is an arithmetic number, because the mean of its divisors is an integer number (209548293120).

Almost surely, 2^{1257284413887} is an apocalyptic number.

1257284413887 is a deficient number, since it is larger than the sum of its proper divisors (419101931073).

1257284413887 is a wasteful number, since it uses less digits than its factorization.

1257284413887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781613.

The product of its digits is 24084480, while the sum is 60.

The spelling of 1257284413887 in words is "one trillion, two hundred fifty-seven billion, two hundred eighty-four million, four hundred thirteen thousand, eight hundred eighty-seven".