1164721 has 8 divisors (see below), whose sum is σ = 1245024. Its totient is φ = 1085760.

The previous prime is 1164689. The next prime is 1164731. The reversal of 1164721 is 1274611.

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 1164721 - 2⁵ = 1164689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1164692 and 1164701.

It is not an unprimeable number, because it can be changed into a prime (1164731) 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, 1966 + ... + 2488.

It is an arithmetic number, because the mean of its divisors is an integer number (155628).

2^1164721 is an apocalyptic number.

It is an amenable number.

1164721 is a deficient number, since it is larger than the sum of its proper divisors (80303).

1164721 is a wasteful number, since it uses less digits than its factorization.

1164721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its digits is 336, while the sum is 22.

The square root of 1164721 is about 1079.2224052530. Note that the first 3 decimals coincide. The cubic root of 1164721 is about 105.2141058254.

The spelling of 1164721 in words is "one million, one hundred sixty-four thousand, seven hundred twenty-one".