1391008 has 24 divisors (see below), whose sum is σ = 2900772. Its totient is φ = 654336.

The previous prime is 1390993. The next prime is 1391011. The reversal of 1391008 is 8001931.

It can be written as a sum of positive squares in 2 ways, for example, as 1373584 + 17424 = 1172^2 + 132^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1391008.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735 + ... + 1822.

2^1391008 is an apocalyptic number.

It is an amenable number.

1391008 is an abundant number, since it is smaller than the sum of its proper divisors (1509764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1391008 is a wasteful number, since it uses less digits than its factorization.

1391008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584 (or 2576 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1391008 is about 1179.4100220025. The cubic root of 1391008 is about 111.6288736243.

Adding to 1391008 its reverse (8001931), we get a palindrome (9392939).

The spelling of 1391008 in words is "one million, three hundred ninety-one thousand, eight".