1242409199 has 8 divisors (see below), whose sum is σ = 1300065120. Its totient is φ = 1186020576.

The previous prime is 1242409177. The next prime is 1242409211. The reversal of 1242409199 is 9919042421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242409199 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 (1242409499) 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, 314819 + ... + 318740.

It is an arithmetic number, because the mean of its divisors is an integer number (162508140).

Almost surely, 2^1242409199 is an apocalyptic number.

1242409199 is a deficient number, since it is larger than the sum of its proper divisors (57655921).

1242409199 is an equidigital number, since it uses as much as digits as its factorization.

1242409199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633649.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1242409199 is about 35247.8254506572. The cubic root of 1242409199 is about 1075.0323982304.

The spelling of 1242409199 in words is "one billion, two hundred forty-two million, four hundred nine thousand, one hundred ninety-nine".