1287862726841 has 4 divisors (see below), whose sum is σ = 1293536131152. Its totient is φ = 1282189322532.

The previous prime is 1287862726837. The next prime is 1287862726853. The reversal of 1287862726841 is 1486272687821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1287862726841 - 2² = 1287862726837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1287862726831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2836701815 + ... + 2836702268.

It is an arithmetic number, because the mean of its divisors is an integer number (323384032788).

Almost surely, 2^{1287862726841} is an apocalyptic number.

It is an amenable number.

1287862726841 is a deficient number, since it is larger than the sum of its proper divisors (5673404311).

1287862726841 is an equidigital number, since it uses as much as digits as its factorization.

1287862726841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5673404310.

The product of its digits is 28901376, while the sum is 62.

The spelling of 1287862726841 in words is "one trillion, two hundred eighty-seven billion, eight hundred sixty-two million, seven hundred twenty-six thousand, eight hundred forty-one".