1285950907481 has 2 divisors, whose sum is σ = 1285950907482. Its totient is φ = 1285950907480.

The previous prime is 1285950907387. The next prime is 1285950907499. The reversal of 1285950907481 is 1847090595821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813349655881 + 472601251600 = 901859^2 + 687460^2 .

It is an emirp because it is prime and its reverse (1847090595821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285950907481 is a prime.

It is a super-2 number, since 2×1285950907481² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1285950907481.

It is not a weakly prime, because it can be changed into another prime (1285950907081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642975453740 + 642975453741.

It is an arithmetic number, because the mean of its divisors is an integer number (642975453741).

Almost surely, 2^{1285950907481} is an apocalyptic number.

It is an amenable number.

1285950907481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285950907481 is an equidigital number, since it uses as much as digits as its factorization.

1285950907481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 59.

The spelling of 1285950907481 in words is "one trillion, two hundred eighty-five billion, nine hundred fifty million, nine hundred seven thousand, four hundred eighty-one".