1289404 has 6 divisors (see below), whose sum is σ = 2256464. Its totient is φ = 644700.

The previous prime is 1289401. The next prime is 1289411. The reversal of 1289404 is 4049821.

1289404 is nontrivially palindromic in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161172 + ... + 161179.

2^1289404 is an apocalyptic number.

It is an amenable number.

1289404 is a deficient number, since it is larger than the sum of its proper divisors (967060).

1289404 is a wasteful number, since it uses less digits than its factorization.

1289404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322355 (or 322353 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1289404 is about 1135.5192644777. The cubic root of 1289404 is about 108.8419559568.

The spelling of 1289404 in words is "one million, two hundred eighty-nine thousand, four hundred four".