1071665 has 16 divisors (see below), whose sum is σ = 1494912. Its totient is φ = 722304.

The previous prime is 1071661. The next prime is 1071671. The reversal of 1071665 is 5661701.

It is a cyclic number.

It is not a de Polignac number, because 1071665 - 2² = 1071661 is a prime.

It is a super-2 number, since 2×1071665² = 2296931744450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1071661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2117 + ... + 2573.

It is an arithmetic number, because the mean of its divisors is an integer number (93432).

2^1071665 is an apocalyptic number.

It is an amenable number.

1071665 is a deficient number, since it is larger than the sum of its proper divisors (423247).

1071665 is an equidigital number, since it uses as much as digits as its factorization.

1071665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1071665 is about 1035.2125385639. The cubic root of 1071665 is about 102.3339369318. Note that the first 3 decimals are identical.

The spelling of 1071665 in words is "one million, seventy-one thousand, six hundred sixty-five".