1160721 has 6 divisors (see below), whose sum is σ = 1676610. Its totient is φ = 773808.

The previous prime is 1160717. The next prime is 1160749. The reversal of 1160721 is 1270611.

It can be written as a sum of positive squares in only one way, i.e., 921600 + 239121 = 960^2 + 489^2 .

It is not a de Polignac number, because 1160721 - 2² = 1160717 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1160694 and 1160703.

It is not an unprimeable number, because it can be changed into a prime (1160771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64476 + ... + 64493.

It is an arithmetic number, because the mean of its divisors is an integer number (279435).

2^1160721 is an apocalyptic number.

It is an amenable number.

1160721 is a deficient number, since it is larger than the sum of its proper divisors (515889).

1160721 is a wasteful number, since it uses less digits than its factorization.

1160721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128975 (or 128972 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 1160721 is about 1077.3676252793. The cubic root of 1160721 is about 105.0935221185.

It can be divided in two parts, 11607 and 21, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 1160721 in words is "one million, one hundred sixty thousand, seven hundred twenty-one".