1288432742 has 4 divisors (see below), whose sum is σ = 1932649116. Its totient is φ = 644216370.

The previous prime is 1288432741. The next prime is 1288432751. The reversal of 1288432742 is 2472348821.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1288432742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288432741) 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, 322108184 + ... + 322108187.

It is an arithmetic number, because the mean of its divisors is an integer number (483162279).

Almost surely, 2^1288432742 is an apocalyptic number.

1288432742 is a deficient number, since it is larger than the sum of its proper divisors (644216374).

1288432742 is an equidigital number, since it uses as much as digits as its factorization.

1288432742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644216373.

The product of its digits is 172032, while the sum is 41.

The square root of 1288432742 is about 35894.7453257437. The cubic root of 1288432742 is about 1088.1462028468.

The spelling of 1288432742 in words is "one billion, two hundred eighty-eight million, four hundred thirty-two thousand, seven hundred forty-two".