1242001199 has 4 divisors (see below), whose sum is σ = 1251780864. Its totient is φ = 1232221536.

The previous prime is 1242001171. The next prime is 1242001231. The reversal of 1242001199 is 9911002421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9911002421 = 617 ⋅16063213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242001199 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 (1242001129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4889642 + ... + 4889895.

It is an arithmetic number, because the mean of its divisors is an integer number (312945216).

Almost surely, 2^1242001199 is an apocalyptic number.

1242001199 is a deficient number, since it is larger than the sum of its proper divisors (9779665).

1242001199 is an equidigital number, since it uses as much as digits as its factorization.

1242001199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9779664.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1242001199 is about 35242.0373843511. The cubic root of 1242001199 is about 1074.9147072044.

The spelling of 1242001199 in words is "one billion, two hundred forty-two million, one thousand, one hundred ninety-nine".