1290426671 has 2 divisors, whose sum is σ = 1290426672. Its totient is φ = 1290426670.

The previous prime is 1290426623. The next prime is 1290426691. The reversal of 1290426671 is 1766240921.

It is a strong prime.

It is an emirp because it is prime and its reverse (1766240921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1290426671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290426611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645213335 + 645213336.

It is an arithmetic number, because the mean of its divisors is an integer number (645213336).

Almost surely, 2^1290426671 is an apocalyptic number.

1290426671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290426671 is an equidigital number, since it uses as much as digits as its factorization.

1290426671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1290426671 is about 35922.5092525564. The cubic root of 1290426671 is about 1088.7072379503.

The spelling of 1290426671 in words is "one billion, two hundred ninety million, four hundred twenty-six thousand, six hundred seventy-one".