1011660 has 48 divisors (see below), whose sum is σ = 3052896. Its totient is φ = 248832.

The previous prime is 1011649. The next prime is 1011667. The reversal of 1011660 is 661101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1011667) 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, 132 + ... + 1428.

It is an arithmetic number, because the mean of its divisors is an integer number (63602).

2^1011660 is an apocalyptic number.

1011660 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 1011660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1526448).

1011660 is an abundant number, since it is smaller than the sum of its proper divisors (2041236).

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

1011660 is a wasteful number, since it uses less digits than its factorization.

1011660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1011660 is about 1005.8131039115. The cubic root of 1011660 is about 100.3871657589.

Adding to 1011660 its reverse (661101), we get a palindrome (1672761).

The spelling of 1011660 in words is "one million, eleven thousand, six hundred sixty".