1391144 has 32 divisors (see below), whose sum is σ = 2828520. Its totient is φ = 638976.

The previous prime is 1391129. The next prime is 1391183. The reversal of 1391144 is 4411931.

1391144 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 4 ways, for example, as 1295044 + 96100 = 1138^2 + 310^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7112 + ... + 7304.

2^1391144 is an apocalyptic number.

It is an amenable number.

1391144 is an abundant number, since it is smaller than the sum of its proper divisors (1437376).

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

1391144 is a wasteful number, since it uses less digits than its factorization.

1391144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 265 counting only the distinct ones).

The product of its digits is 432, while the sum is 23.

The square root of 1391144 is about 1179.4676765389. The cubic root of 1391144 is about 111.6325115214.

The spelling of 1391144 in words is "one million, three hundred ninety-one thousand, one hundred forty-four".