1243132439 has 8 divisors (see below), whose sum is σ = 1247072640. Its totient is φ = 1239199416.

The previous prime is 1243132427. The next prime is 1243132459. The reversal of 1243132439 is 9342313421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1243132439 - 2¹² = 1243128343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243132459) 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 in 7 ways as a sum of consecutive naturals, for example, 720632 + ... + 722354.

It is an arithmetic number, because the mean of its divisors is an integer number (155884080).

Almost surely, 2^1243132439 is an apocalyptic number.

1243132439 is a deficient number, since it is larger than the sum of its proper divisors (3940201).

1243132439 is a wasteful number, since it uses less digits than its factorization.

1243132439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589.

The product of its digits is 15552, while the sum is 32.

The square root of 1243132439 is about 35258.0833143267. The cubic root of 1243132439 is about 1075.2409595782.

The spelling of 1243132439 in words is "one billion, two hundred forty-three million, one hundred thirty-two thousand, four hundred thirty-nine".