1243381459 has 2 divisors, whose sum is σ = 1243381460. Its totient is φ = 1243381458.

The previous prime is 1243381423. The next prime is 1243381481. The reversal of 1243381459 is 9541833421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243381459 - 2⁷ = 1243381331 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243381499) 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, 621690729 + 621690730.

It is an arithmetic number, because the mean of its divisors is an integer number (621690730).

Almost surely, 2^1243381459 is an apocalyptic number.

1243381459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243381459 is an equidigital number, since it uses as much as digits as its factorization.

1243381459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

The square root of 1243381459 is about 35261.6145262806. The cubic root of 1243381459 is about 1075.3127509708.

The spelling of 1243381459 in words is "one billion, two hundred forty-three million, three hundred eighty-one thousand, four hundred fifty-nine".