1391282 has 4 divisors (see below), whose sum is σ = 2086926. Its totient is φ = 695640.

The previous prime is 1391281. The next prime is 1391287. The reversal of 1391282 is 2821931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2821931 = 7 ⋅403133.

It can be written as a sum of positive squares in only one way, i.e., 1301881 + 89401 = 1141^2 + 299^2 .

It is a super-3 number, since 3×1391282³ = 8079170136606233304, which contains 333 as substring.

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 as a sum of consecutive naturals, namely, 347819 + ... + 347822.

2^1391282 is an apocalyptic number.

1391282 is a deficient number, since it is larger than the sum of its proper divisors (695644).

1391282 is an equidigital number, since it uses as much as digits as its factorization.

1391282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695643.

The product of its digits is 864, while the sum is 26.

The square root of 1391282 is about 1179.5261760555. The cubic root of 1391282 is about 111.6362026747.

The spelling of 1391282 in words is "one million, three hundred ninety-one thousand, two hundred eighty-two".