1289398 has 32 divisors (see below), whose sum is σ = 2280960. Its totient is φ = 540960.

The previous prime is 1289381. The next prime is 1289401. The reversal of 1289398 is 8939821.

It is a self number, because there is not a number n which added to its sum of digits gives 1289398.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27411 + ... + 27457.

It is an arithmetic number, because the mean of its divisors is an integer number (71280).

2^1289398 is an apocalyptic number.

1289398 is a deficient number, since it is larger than the sum of its proper divisors (991562).

1289398 is a wasteful number, since it uses less digits than its factorization.

1289398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132.

The product of its digits is 31104, while the sum is 40.

The square root of 1289398 is about 1135.5166225115. The cubic root of 1289398 is about 108.8417871313.

The spelling of 1289398 in words is "one million, two hundred eighty-nine thousand, three hundred ninety-eight".