1071687 has 4 divisors (see below), whose sum is σ = 1428920. Its totient is φ = 714456.

The previous prime is 1071683. The next prime is 1071703. The reversal of 1071687 is 7861701.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1071687 - 2² = 1071683 is a prime.

It is a super-2 number, since 2×1071687² = 2297026051938, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1071683) 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, 178612 + ... + 178617.

It is an arithmetic number, because the mean of its divisors is an integer number (357230).

2^1071687 is an apocalyptic number.

1071687 is a deficient number, since it is larger than the sum of its proper divisors (357233).

1071687 is an equidigital number, since it uses as much as digits as its factorization.

1071687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357232.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 1071687 is about 1035.2231643467. The cubic root of 1071687 is about 102.3346371914.

The spelling of 1071687 in words is "one million, seventy-one thousand, six hundred eighty-seven".