1660031 has 4 divisors (see below), whose sum is σ = 1662672. Its totient is φ = 1657392.

The previous prime is 1660007. The next prime is 1660037. The reversal of 1660031 is 1300661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1300661 = 37 ⋅35153.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660031 is a prime.

It is a super-2 number, since 2×1660031² = 5511405841922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1659991 and 1660009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230 + ... + 1836.

It is an arithmetic number, because the mean of its divisors is an integer number (415668).

2^1660031 is an apocalyptic number.

1660031 is a deficient number, since it is larger than the sum of its proper divisors (2641).

1660031 is a wasteful number, since it uses less digits than its factorization.

1660031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1660031 is about 1288.4219029495. The cubic root of 1660031 is about 118.4055518078.

Adding to 1660031 its reverse (1300661), we get a palindrome (2960692).

The spelling of 1660031 in words is "one million, six hundred sixty thousand, thirty-one".