1298517379 has 4 divisors (see below), whose sum is σ = 1298601520. Its totient is φ = 1298433240.

The previous prime is 1298517377. The next prime is 1298517449. The reversal of 1298517379 is 9737158921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1298517379 - 2¹ = 1298517377 is a prime.

It is a super-2 number, since 2×1298517379² = 3372294767130059282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298517377) 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, 11532 + ... + 52249.

It is an arithmetic number, because the mean of its divisors is an integer number (324650380).

Almost surely, 2^1298517379 is an apocalyptic number.

1298517379 is a deficient number, since it is larger than the sum of its proper divisors (84141).

1298517379 is an equidigital number, since it uses as much as digits as its factorization.

1298517379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84140.

The product of its digits is 952560, while the sum is 52.

The square root of 1298517379 is about 36034.9466351762. The cubic root of 1298517379 is about 1090.9778221530.

The spelling of 1298517379 in words is "one billion, two hundred ninety-eight million, five hundred seventeen thousand, three hundred seventy-nine".