1299245279 has 2 divisors, whose sum is σ = 1299245280. Its totient is φ = 1299245278.

The previous prime is 1299245267. The next prime is 1299245323. The reversal of 1299245279 is 9725429921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1299245279 - 2¹⁶ = 1299179743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299245209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649622639 + 649622640.

It is an arithmetic number, because the mean of its divisors is an integer number (649622640).

Almost surely, 2^1299245279 is an apocalyptic number.

1299245279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299245279 is an equidigital number, since it uses as much as digits as its factorization.

1299245279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 50.

The square root of 1299245279 is about 36045.0451379937. The cubic root of 1299245279 is about 1091.1816377842.

The spelling of 1299245279 in words is "one billion, two hundred ninety-nine million, two hundred forty-five thousand, two hundred seventy-nine".