1180921 has 8 divisors (see below), whose sum is σ = 1368704. Its totient is φ = 997920.

The previous prime is 1180913. The next prime is 1180931. The reversal of 1180921 is 1290811.

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

It is not a de Polignac number, because 1180921 - 2³ = 1180913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1180892 and 1180901.

It is not an unprimeable number, because it can be changed into a prime (1180901) 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, 645 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (171088).

2^1180921 is an apocalyptic number.

It is an amenable number.

1180921 is a deficient number, since it is larger than the sum of its proper divisors (187783).

1180921 is an equidigital number, since it uses as much as digits as its factorization.

1180921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1180921 is about 1086.7018910446. The cubic root of 1180921 is about 105.6996660537.

The spelling of 1180921 in words is "one million, one hundred eighty thousand, nine hundred twenty-one".