Search a number
-
+
744221 is a prime number
BaseRepresentation
bin10110101101100011101
31101210212202
42311230131
5142303341
623541245
76216512
oct2655435
91353782
10744221
11469165
122ba825
1320098a
14155309
15ea79b
hexb5b1d

744221 has 2 divisors, whose sum is σ = 744222. Its totient is φ = 744220.

The previous prime is 744203. The next prime is 744239. The reversal of 744221 is 122447.

It is a balanced prime because it is at equal distance from previous prime (744203) and next prime (744239).

It can be written as a sum of positive squares in only one way, i.e., 592900 + 151321 = 770^2 + 389^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-744221 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 744193 and 744202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372110 + 372111.

It is an arithmetic number, because the mean of its divisors is an integer number (372111).

2744221 is an apocalyptic number.

It is an amenable number.

744221 is a deficient number, since it is larger than the sum of its proper divisors (1).

744221 is an equidigital number, since it uses as much as digits as its factorization.

744221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 20.

The square root of 744221 is about 862.6824444719. The cubic root of 744221 is about 90.6220690293.

Adding to 744221 its reverse (122447), we get a palindrome (866668).

The spelling of 744221 in words is "seven hundred forty-four thousand, two hundred twenty-one", and thus it is an iban number.