1242434439 has 24 divisors (see below), whose sum is σ = 1840600944. Its totient is φ = 807120000.

The previous prime is 1242434423. The next prime is 1242434483. The reversal of 1242434439 is 9344342421.

It is not a de Polignac number, because 1242434439 - 2⁴ = 1242434423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242434939) 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 23 ways as a sum of consecutive naturals, for example, 434364 + ... + 437214.

It is an arithmetic number, because the mean of its divisors is an integer number (76691706).

Almost surely, 2^1242434439 is an apocalyptic number.

1242434439 is a deficient number, since it is larger than the sum of its proper divisors (598166505).

1242434439 is a wasteful number, since it uses less digits than its factorization.

1242434439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4079 (or 4076 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 1242434439 is about 35248.1834851103. The cubic root of 1242434439 is about 1075.0396780740.

The spelling of 1242434439 in words is "one billion, two hundred forty-two million, four hundred thirty-four thousand, four hundred thirty-nine".