1225579 has 2 divisors, whose sum is σ = 1225580. Its totient is φ = 1225578.

The previous prime is 1225577. The next prime is 1225589. The reversal of 1225579 is 9755221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225579 - 2¹ = 1225577 is a prime.

Together with 1225577, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 1 + 2⁷ + 2¹² + 5⁴ + 5⁸ + 7⁷ + 9⁴ .

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1225579.

It is not a weakly prime, because it can be changed into another prime (1225571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612789 + 612790.

It is an arithmetic number, because the mean of its divisors is an integer number (612790).

2^1225579 is an apocalyptic number.

1225579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225579 is an equidigital number, since it uses as much as digits as its factorization.

1225579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 31.

The square root of 1225579 is about 1107.0587156967. The cubic root of 1225579 is about 107.0156031632.

The spelling of 1225579 in words is "one million, two hundred twenty-five thousand, five hundred seventy-nine".