1289898 has 16 divisors (see below), whose sum is σ = 2866560. Its totient is φ = 429948.

The previous prime is 1289881. The next prime is 1289921. The reversal of 1289898 is 8989821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11890 + ... + 11997.

It is an arithmetic number, because the mean of its divisors is an integer number (179160).

2^1289898 is an apocalyptic number.

1289898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1289898 is an abundant number, since it is smaller than the sum of its proper divisors (1576662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1289898 is a wasteful number, since it uses less digits than its factorization.

1289898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23898 (or 23892 counting only the distinct ones).

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

The square root of 1289898 is about 1135.7367652762. The cubic root of 1289898 is about 108.8558541250.

It can be divided in two parts, 12898 and 98, that added together give a square (12996 = 114²).

The spelling of 1289898 in words is "one million, two hundred eighty-nine thousand, eight hundred ninety-eight".