1299207138 has 8 divisors (see below), whose sum is σ = 2598414288. Its totient is φ = 433069044.

The previous prime is 1299207131. The next prime is 1299207157. The reversal of 1299207138 is 8317029921.

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

1299207138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1299207138.

It is not an unprimeable number, because it can be changed into a prime (1299207131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108267256 + ... + 108267267.

It is an arithmetic number, because the mean of its divisors is an integer number (324801786).

Almost surely, 2^1299207138 is an apocalyptic number.

1299207138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1299207138 is a wasteful number, since it uses less digits than its factorization.

1299207138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216534528.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1299207138 is about 36044.5160600056. The cubic root of 1299207138 is about 1091.1709600041.

The spelling of 1299207138 in words is "one billion, two hundred ninety-nine million, two hundred seven thousand, one hundred thirty-eight".