1299895138 has 16 divisors (see below), whose sum is σ = 1958432256. Its totient is φ = 647091520.

The previous prime is 1299895133. The next prime is 1299895141. The reversal of 1299895138 is 8315989921.

It is not an unprimeable number, because it can be changed into a prime (1299895133) 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 7 ways as a sum of consecutive naturals, for example, 509895 + ... + 512437.

It is an arithmetic number, because the mean of its divisors is an integer number (122402016).

Almost surely, 2^1299895138 is an apocalyptic number.

1299895138 is a deficient number, since it is larger than the sum of its proper divisors (658537118).

1299895138 is a wasteful number, since it uses less digits than its factorization.

1299895138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569.

The product of its digits is 1399680, while the sum is 55.

The square root of 1299895138 is about 36054.0585510148. The cubic root of 1299895138 is about 1091.3635372360.

The spelling of 1299895138 in words is "one billion, two hundred ninety-nine million, eight hundred ninety-five thousand, one hundred thirty-eight".