1166520 has 32 divisors (see below), whose sum is σ = 3499920. Its totient is φ = 311040.

The previous prime is 1166507. The next prime is 1166527. The reversal of 1166520 is 256611.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4741 + ... + 4980.

2^1166520 is an apocalyptic number.

1166520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166520 is an abundant number, since it is smaller than the sum of its proper divisors (2333400).

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

1166520 is a wasteful number, since it uses less digits than its factorization.

1166520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9735 (or 9731 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1166520 is about 1080.0555541267. The cubic root of 1166520 is about 105.2682483503.

Subtracting from 1166520 its reverse (256611), we obtain a palindrome (909909).

The spelling of 1166520 in words is "one million, one hundred sixty-six thousand, five hundred twenty".