1132721 has 2 divisors, whose sum is σ = 1132722. Its totient is φ = 1132720.

The previous prime is 1132697. The next prime is 1132739. The reversal of 1132721 is 1272311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1132096 + 625 = 1064^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 1132721 - 2¹⁴ = 1116337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1132721.

It is not a weakly prime, because it can be changed into another prime (1132321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 566360 + 566361.

It is an arithmetic number, because the mean of its divisors is an integer number (566361).

2^1132721 is an apocalyptic number.

It is an amenable number.

1132721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1132721 is an equidigital number, since it uses as much as digits as its factorization.

1132721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84, while the sum is 17.

The square root of 1132721 is about 1064.2936624823. The cubic root of 1132721 is about 104.2415796767.

The spelling of 1132721 in words is "one million, one hundred thirty-two thousand, seven hundred twenty-one".