1351241509 has 2 divisors, whose sum is σ = 1351241510. Its totient is φ = 1351241508.

The previous prime is 1351241473. The next prime is 1351241527. The reversal of 1351241509 is 9051421531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733868100 + 617373409 = 27090^2 + 24847^2 .

It is an emirp because it is prime and its reverse (9051421531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1351241509 - 2¹⁵ = 1351208741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1351241539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675620754 + 675620755.

It is an arithmetic number, because the mean of its divisors is an integer number (675620755).

Almost surely, 2^1351241509 is an apocalyptic number.

It is an amenable number.

1351241509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351241509 is an equidigital number, since it uses as much as digits as its factorization.

1351241509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1351241509 is about 36759.2370568270. The cubic root of 1351241509 is about 1105.5481426968.

The spelling of 1351241509 in words is "one billion, three hundred fifty-one million, two hundred forty-one thousand, five hundred nine".