1299961299 has 16 divisors (see below), whose sum is σ = 2133270272. Its totient is φ = 685693728.

The previous prime is 1299961259. The next prime is 1299961319. The reversal of 1299961299 is 9921699921.

It is not a de Polignac number, because 1299961299 - 2¹¹ = 1299959251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1299961259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2380609 + ... + 2381154.

It is an arithmetic number, because the mean of its divisors is an integer number (133329392).

Almost surely, 2^1299961299 is an apocalyptic number.

1299961299 is a deficient number, since it is larger than the sum of its proper divisors (833308973).

1299961299 is a wasteful number, since it uses less digits than its factorization.

1299961299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761786.

The product of its digits is 1417176, while the sum is 57.

The square root of 1299961299 is about 36054.9760643382. The cubic root of 1299961299 is about 1091.3820526983.

The spelling of 1299961299 in words is "one billion, two hundred ninety-nine million, nine hundred sixty-one thousand, two hundred ninety-nine".