1182721 has 8 divisors (see below), whose sum is σ = 1217160. Its totient is φ = 1148928.

The previous prime is 1182703. The next prime is 1182737. The reversal of 1182721 is 1272811.

It can be written as a sum of positive squares in 4 ways, for example, as 69696 + 1113025 = 264^2 + 1055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1182721 - 2⁵ = 1182689 is a prime.

It is a deceptive number, since it divides R_1182720.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1182692 and 1182701.

It is not an unprimeable number, because it can be changed into a prime (1182781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8565 + ... + 8701.

It is an arithmetic number, because the mean of its divisors is an integer number (152145).

2^1182721 is an apocalyptic number.

It is an amenable number.

1182721 is a deficient number, since it is larger than the sum of its proper divisors (34439).

1182721 is an equidigital number, since it uses as much as digits as its factorization.

1182721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323.

The product of its digits is 224, while the sum is 22.

The square root of 1182721 is about 1087.5297697075. The cubic root of 1182721 is about 105.7533424679.

The spelling of 1182721 in words is "one million, one hundred eighty-two thousand, seven hundred twenty-one".