1243045439 has 8 divisors (see below), whose sum is σ = 1269963648. Its totient is φ = 1216373400.

The previous prime is 1243045367. The next prime is 1243045477. The reversal of 1243045439 is 9345403421.

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 1243045439 - 2²⁴ = 1226268223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243045399 and 1243045408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243047439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51317 + ... + 71550.

It is an arithmetic number, because the mean of its divisors is an integer number (158745456).

Almost surely, 2^1243045439 is an apocalyptic number.

1243045439 is a deficient number, since it is larger than the sum of its proper divisors (26918209).

1243045439 is a wasteful number, since it uses less digits than its factorization.

1243045439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123085.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1243045439 is about 35256.8495331049. The cubic root of 1243045439 is about 1075.2158755933.

The spelling of 1243045439 in words is "one billion, two hundred forty-three million, forty-five thousand, four hundred thirty-nine".