Search a number
-
+
1225589 is a prime number
BaseRepresentation
bin100101011001101110101
32022021012012
410223031311
5303204324
642134005
713263101
oct4531565
92267165
101225589
11767892
124b1305
1333bb01
1423c901
1519320e
hex12b375

1225589 has 2 divisors, whose sum is σ = 1225590. Its totient is φ = 1225588.

The previous prime is 1225579. The next prime is 1225591. The reversal of 1225589 is 9855221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1030225 + 195364 = 1015^2 + 442^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225589 - 220 = 177013 is a prime.

Together with 1225591, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612794 + 612795.

It is an arithmetic number, because the mean of its divisors is an integer number (612795).

21225589 is an apocalyptic number.

It is an amenable number.

1225589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225589 is an equidigital number, since it uses as much as digits as its factorization.

1225589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 32.

The square root of 1225589 is about 1107.0632321598. The cubic root of 1225589 is about 107.0158942237.

The spelling of 1225589 in words is "one million, two hundred twenty-five thousand, five hundred eighty-nine".