1298889 has 16 divisors (see below), whose sum is σ = 1953600. Its totient is φ = 852768.

The previous prime is 1298887. The next prime is 1298909. The reversal of 1298889 is 9888921.

It is not a de Polignac number, because 1298889 - 2¹ = 1298887 is a prime.

It is a super-2 number, since 2×1298889² = 3374225268642, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1298887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1642 + ... + 2300.

It is an arithmetic number, because the mean of its divisors is an integer number (122100).

2^1298889 is an apocalyptic number.

It is an amenable number.

1298889 is a deficient number, since it is larger than the sum of its proper divisors (654711).

1298889 is an equidigital number, since it uses as much as digits as its factorization.

1298889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 735 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 1298889 is about 1139.6881152315. The cubic root of 1298889 is about 109.1081887401.

It can be divided in two parts, 1298 and 889, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1298889 in words is "one million, two hundred ninety-eight thousand, eight hundred eighty-nine".