1298297986 has 8 divisors (see below), whose sum is σ = 1947931020. Its totient is φ = 648987648.

The previous prime is 1298297983. The next prime is 1298297989. The reversal of 1298297986 is 6897928921.

It is an interprime number because it is at equal distance from previous prime (1298297983) and next prime (1298297989).

It can be written as a sum of positive squares in 2 ways, for example, as 1298232961 + 65025 = 36031^2 + 255^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1298297983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70351 + ... + 86866.

Almost surely, 2^1298297986 is an apocalyptic number.

1298297986 is a deficient number, since it is larger than the sum of its proper divisors (649633034).

1298297986 is a wasteful number, since it uses less digits than its factorization.

1298297986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161348.

The product of its digits is 7838208, while the sum is 61.

The square root of 1298297986 is about 36031.9023366794. The cubic root of 1298297986 is about 1090.9163760806.

The spelling of 1298297986 in words is "one billion, two hundred ninety-eight million, two hundred ninety-seven thousand, nine hundred eighty-six".