1204999138 has 8 divisors (see below), whose sum is σ = 2065712832. Its totient is φ = 516428196.

The previous prime is 1204999129. The next prime is 1204999139. The reversal of 1204999138 is 8319994021.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1204999139) 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, 43035670 + ... + 43035697.

It is an arithmetic number, because the mean of its divisors is an integer number (258214104).

Almost surely, 2^1204999138 is an apocalyptic number.

1204999138 is a deficient number, since it is larger than the sum of its proper divisors (860713694).

1204999138 is an equidigital number, since it uses as much as digits as its factorization.

1204999138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86071376.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 1204999138 is about 34713.0974993589. The cubic root of 1204999138 is about 1064.1321849691.

The spelling of 1204999138 in words is "one billion, two hundred four million, nine hundred ninety-nine thousand, one hundred thirty-eight".