1291288 has 8 divisors (see below), whose sum is σ = 2421180. Its totient is φ = 645640.

The previous prime is 1291271. The next prime is 1291313. The reversal of 1291288 is 8821921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80698 + ... + 80713.

2^1291288 is an apocalyptic number.

It is an amenable number.

1291288 is a deficient number, since it is larger than the sum of its proper divisors (1129892).

1291288 is a wasteful number, since it uses less digits than its factorization.

1291288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161417 (or 161413 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 1291288 is about 1136.3485380815. The cubic root of 1291288 is about 108.8949412774.

The spelling of 1291288 in words is "one million, two hundred ninety-one thousand, two hundred eighty-eight".