1299967247 has 4 divisors (see below), whose sum is σ = 1304201976. Its totient is φ = 1295732520.

The previous prime is 1299967211. The next prime is 1299967259. The reversal of 1299967247 is 7427699921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7427699921 = 59 ⋅125893219.

It is a cyclic number.

It is not a de Polignac number, because 1299967247 - 2¹⁶ = 1299901711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1299967192 and 1299967201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299967267) 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, 2116904 + ... + 2117517.

It is an arithmetic number, because the mean of its divisors is an integer number (326050494).

Almost surely, 2^1299967247 is an apocalyptic number.

1299967247 is a deficient number, since it is larger than the sum of its proper divisors (4234729).

1299967247 is an equidigital number, since it uses as much as digits as its factorization.

1299967247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234728.

The product of its digits is 3429216, while the sum is 56.

The square root of 1299967247 is about 36055.0585493908. The cubic root of 1299967247 is about 1091.3837172428.

The spelling of 1299967247 in words is "one billion, two hundred ninety-nine million, nine hundred sixty-seven thousand, two hundred forty-seven".