1242434399 has 8 divisors (see below), whose sum is σ = 1301657088. Its totient is φ = 1184408280.

The previous prime is 1242434371. The next prime is 1242434423. The reversal of 1242434399 is 9934342421.

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 1242434399 - 2¹² = 1242430303 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 (1242434329) 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, 297017 + ... + 301170.

It is an arithmetic number, because the mean of its divisors is an integer number (162707136).

Almost surely, 2^1242434399 is an apocalyptic number.

1242434399 is a deficient number, since it is larger than the sum of its proper divisors (59222689).

1242434399 is an equidigital number, since it uses as much as digits as its factorization.

1242434399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598285.

The product of its digits is 186624, while the sum is 41.

The square root of 1242434399 is about 35248.1829177051. The cubic root of 1242434399 is about 1075.0396665370.

The spelling of 1242434399 in words is "one billion, two hundred forty-two million, four hundred thirty-four thousand, three hundred ninety-nine".