1286124389551 has 2 divisors, whose sum is σ = 1286124389552. Its totient is φ = 1286124389550.

The previous prime is 1286124389531. The next prime is 1286124389587. The reversal of 1286124389551 is 1559834216821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1286124389551 - 2⁷ = 1286124389423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1286124389492 and 1286124389501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1286124389531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643062194775 + 643062194776.

It is an arithmetic number, because the mean of its divisors is an integer number (643062194776).

Almost surely, 2^{1286124389551} is an apocalyptic number.

1286124389551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286124389551 is an equidigital number, since it uses as much as digits as its factorization.

1286124389551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4147200, while the sum is 55.

The spelling of 1286124389551 in words is "one trillion, two hundred eighty-six billion, one hundred twenty-four million, three hundred eighty-nine thousand, five hundred fifty-one".