1144721 has 2 divisors, whose sum is σ = 1144722. Its totient is φ = 1144720.

The previous prime is 1144691. The next prime is 1144723. The reversal of 1144721 is 1274411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 883600 + 261121 = 940^2 + 511^2 .

It is an emirp because it is prime and its reverse (1274411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1144721 - 2⁶ = 1144657 is a prime.

Together with 1144723, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1144693 and 1144702.

It is not a weakly prime, because it can be changed into another prime (1144723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572360 + 572361.

It is an arithmetic number, because the mean of its divisors is an integer number (572361).

2^1144721 is an apocalyptic number.

It is an amenable number.

1144721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144721 is an equidigital number, since it uses as much as digits as its factorization.

1144721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 20.

The square root of 1144721 is about 1069.9163518706. The cubic root of 1144721 is about 104.6083977040.

The spelling of 1144721 in words is "one million, one hundred forty-four thousand, seven hundred twenty-one".