1291232 has 12 divisors (see below), whose sum is σ = 2542176. Its totient is φ = 645600.

The previous prime is 1291229. The next prime is 1291249. The reversal of 1291232 is 2321921.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20144 + ... + 20207.

It is an arithmetic number, because the mean of its divisors is an integer number (211848).

2^1291232 is an apocalyptic number.

It is an amenable number.

1291232 is a deficient number, since it is larger than the sum of its proper divisors (1250944).

1291232 is an equidigital number, since it uses as much as digits as its factorization.

1291232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40361 (or 40353 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 1291232 is about 1136.3238974870. The cubic root of 1291232 is about 108.8933670856.

The spelling of 1291232 in words is "one million, two hundred ninety-one thousand, two hundred thirty-two".