1391288 has 16 divisors (see below), whose sum is σ = 2652360. Its totient is φ = 684000.

The previous prime is 1391287. The next prime is 1391317. The reversal of 1391288 is 8821931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391281) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 938 + ... + 1913.

2^1391288 is an apocalyptic number.

It is an amenable number.

1391288 is a deficient number, since it is larger than the sum of its proper divisors (1261072).

1391288 is a wasteful number, since it uses less digits than its factorization.

1391288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918 (or 2914 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 1391288 is about 1179.5287194469. The cubic root of 1391288 is about 111.6363631541.

The spelling of 1391288 in words is "one million, three hundred ninety-one thousand, two hundred eighty-eight".