1071684 has 24 divisors (see below), whose sum is σ = 2778720. Its totient is φ = 357192.

The previous prime is 1071683. The next prime is 1071703. The reversal of 1071684 is 4861701.

It is a happy number.

It is a super-2 number, since 2×1071684² = 2297013191712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1071683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4854 + ... + 5069.

It is an arithmetic number, because the mean of its divisors is an integer number (115780).

2^1071684 is an apocalyptic number.

It is an amenable number.

1071684 is an abundant number, since it is smaller than the sum of its proper divisors (1707036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1071684 is a wasteful number, since it uses less digits than its factorization.

1071684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9936 (or 9928 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1071684 is about 1035.2217153827. The cubic root of 1071684 is about 102.3345417021.

The spelling of 1071684 in words is "one million, seventy-one thousand, six hundred eighty-four".