1386331 has 4 divisors (see below), whose sum is σ = 1395664. Its totient is φ = 1377000.

The previous prime is 1386317. The next prime is 1386337. The reversal of 1386331 is 1336831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1336831 = 929 ⋅1439.

It is a cyclic number.

It is not a de Polignac number, because 1386331 - 2¹⁷ = 1255259 is a prime.

It is a super-2 number, since 2×1386331² = 3843827283122, which contains 22 as substring.

It is a Duffinian number.

1386331 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1386296 and 1386305.

It is not an unprimeable number, because it can be changed into a prime (1386337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4440 + ... + 4741.

It is an arithmetic number, because the mean of its divisors is an integer number (348916).

2^1386331 is an apocalyptic number.

1386331 is a deficient number, since it is larger than the sum of its proper divisors (9333).

1386331 is an equidigital number, since it uses as much as digits as its factorization.

1386331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9332.

The product of its digits is 1296, while the sum is 25.

The square root of 1386331 is about 1177.4255815125. The cubic root of 1386331 is about 111.5036228521.

The spelling of 1386331 in words is "one million, three hundred eighty-six thousand, three hundred thirty-one".