1071660 has 48 divisors (see below), whose sum is σ = 3066336. Its totient is φ = 279552.

The previous prime is 1071659. The next prime is 1071661. The reversal of 1071660 is 661701.

It is an interprime number because it is at equal distance from previous prime (1071659) and next prime (1071661).

It is a super-2 number, since 2×1071660² = 2296910311200, which contains 22 as substring.

It is a congruent 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, 3012 + ... + 3348.

It is an arithmetic number, because the mean of its divisors is an integer number (63882).

2^1071660 is an apocalyptic number.

1071660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1071660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533168).

1071660 is an abundant number, since it is smaller than the sum of its proper divisors (1994676).

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

1071660 is a wasteful number, since it uses less digits than its factorization.

1071660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1071660 is about 1035.2101235981. The cubic root of 1071660 is about 102.3337777806. Note that the first 3 decimals are identical.

The spelling of 1071660 in words is "one million, seventy-one thousand, six hundred sixty".