1298232289 has 4 divisors (see below), whose sum is σ = 1298937024. Its totient is φ = 1297527556.

The previous prime is 1298232277. The next prime is 1298232301. The reversal of 1298232289 is 9822328921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9822328921 = 647 ⋅15181343.

It is an interprime number because it is at equal distance from previous prime (1298232277) and next prime (1298232301).

It is a cyclic number.

It is not a de Polignac number, because 1298232289 - 2⁷ = 1298232161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1298232389) 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, 349597 + ... + 353290.

It is an arithmetic number, because the mean of its divisors is an integer number (324734256).

Almost surely, 2^1298232289 is an apocalyptic number.

It is an amenable number.

1298232289 is a deficient number, since it is larger than the sum of its proper divisors (704735).

1298232289 is an equidigital number, since it uses as much as digits as its factorization.

1298232289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704734.

The product of its digits is 248832, while the sum is 46.

The square root of 1298232289 is about 36030.9906746956. The cubic root of 1298232289 is about 1090.8979747729.

The spelling of 1298232289 in words is "one billion, two hundred ninety-eight million, two hundred thirty-two thousand, two hundred eighty-nine".