1288432741 has 2 divisors, whose sum is σ = 1288432742. Its totient is φ = 1288432740.

The previous prime is 1288432729. The next prime is 1288432751. The reversal of 1288432741 is 1472348821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 744143841 + 544288900 = 27279^2 + 23330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1288432741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1288432694 and 1288432703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1288432721) 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, 644216370 + 644216371.

It is an arithmetic number, because the mean of its divisors is an integer number (644216371).

Almost surely, 2^1288432741 is an apocalyptic number.

It is an amenable number.

1288432741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288432741 is an equidigital number, since it uses as much as digits as its factorization.

1288432741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 40.

The square root of 1288432741 is about 35894.7453118141. The cubic root of 1288432741 is about 1088.1462025653.

The spelling of 1288432741 in words is "one billion, two hundred eighty-eight million, four hundred thirty-two thousand, seven hundred forty-one".