1290735943487 has 2 divisors, whose sum is σ = 1290735943488. Its totient is φ = 1290735943486.

The previous prime is 1290735943463. The next prime is 1290735943493. The reversal of 1290735943487 is 7843495370921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1290735943487 - 2¹² = 1290735939391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290735943417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645367971743 + 645367971744.

It is an arithmetic number, because the mean of its divisors is an integer number (645367971744).

Almost surely, 2^{1290735943487} is an apocalyptic number.

1290735943487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290735943487 is an equidigital number, since it uses as much as digits as its factorization.

1290735943487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 62.

The spelling of 1290735943487 in words is "one trillion, two hundred ninety billion, seven hundred thirty-five million, nine hundred forty-three thousand, four hundred eighty-seven".