1386831 has 16 divisors (see below), whose sum is σ = 1958400. Its totient is φ = 871200.

The previous prime is 1386823. The next prime is 1386839.

1386831 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1386823) and next prime (1386839).

It is not a de Polignac number, because 1386831 - 2³ = 1386823 is a prime.

It is a super-2 number, since 2×1386831² = 3846600445122, which contains 22 as substring.

1386831 is a modest number, since divided by 6831 gives 138 as remainder.

1386831 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386839) 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 15 ways as a sum of consecutive naturals, for example, 6870 + ... + 7068.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2^1386831 is an apocalyptic number.

1386831 is a deficient number, since it is larger than the sum of its proper divisors (571569).

1386831 is a wasteful number, since it uses less digits than its factorization.

1386831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326.

The product of its digits is 3456, while the sum is 30.

The square root of 1386831 is about 1177.6378900154. The cubic root of 1386831 is about 111.5170263635.

The spelling of 1386831 in words is "one million, three hundred eighty-six thousand, eight hundred thirty-one".