1163721 has 16 divisors (see below), whose sum is σ = 1705536. Its totient is φ = 701376.

The previous prime is 1163719. The next prime is 1163737. The reversal of 1163721 is 1273611.

It is not a de Polignac number, because 1163721 - 2¹ = 1163719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1163711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1786 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (106596).

2^1163721 is an apocalyptic number.

It is an amenable number.

1163721 is a deficient number, since it is larger than the sum of its proper divisors (541815).

1163721 is a wasteful number, since it uses less digits than its factorization.

1163721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632.

The product of its digits is 252, while the sum is 21.

The square root of 1163721 is about 1078.7590092324. The cubic root of 1163721 is about 105.1839858133.

The spelling of 1163721 in words is "one million, one hundred sixty-three thousand, seven hundred twenty-one".