1298769 has 4 divisors (see below), whose sum is σ = 1731696. Its totient is φ = 865844.

The previous prime is 1298747. The next prime is 1298771. The reversal of 1298769 is 9678921.

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.

It is a cyclic number.

It is not a de Polignac number, because 1298769 - 2⁷ = 1298641 is a prime.

It is a super-2 number, since 2×1298769² = 3373601830722, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

1298769 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1298769.

It is not an unprimeable number, because it can be changed into a prime (1298719) 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, 216459 + ... + 216464.

It is an arithmetic number, because the mean of its divisors is an integer number (432924).

2^1298769 is an apocalyptic number.

It is an amenable number.

1298769 is a deficient number, since it is larger than the sum of its proper divisors (432927).

1298769 is an equidigital number, since it uses as much as digits as its factorization.

1298769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432926.

The product of its digits is 54432, while the sum is 42.

The square root of 1298769 is about 1139.6354680335. The cubic root of 1298769 is about 109.1048285900.

The spelling of 1298769 in words is "one million, two hundred ninety-eight thousand, seven hundred sixty-nine".