1172180 has 48 divisors (see below), whose sum is σ = 2661120. Its totient is φ = 432768.

The previous prime is 1172179. The next prime is 1172207. The reversal of 1172180 is 812711.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24917 + ... + 24963.

It is an arithmetic number, because the mean of its divisors is an integer number (55440).

2^1172180 is an apocalyptic number.

1172180 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 1172180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330560).

1172180 is an abundant number, since it is smaller than the sum of its proper divisors (1488940).

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

1172180 is a wasteful number, since it uses less digits than its factorization.

1172180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1172180 is about 1082.6726190313. The cubic root of 1172180 is about 105.4382289280.

Adding to 1172180 its reverse (812711), we get a palindrome (1984891).

The spelling of 1172180 in words is "one million, one hundred seventy-two thousand, one hundred eighty".