1225022609 has 2 divisors, whose sum is σ = 1225022610. Its totient is φ = 1225022608.

The previous prime is 1225022599. The next prime is 1225022651. The reversal of 1225022609 is 9062205221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978438400 + 246584209 = 31280^2 + 15703^2 .

It is an emirp because it is prime and its reverse (9062205221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225022609 - 2⁴ = 1225022593 is a prime.

It is a super-2 number, since 2×1225022609² = 3001360785122333762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1225022509) 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, 612511304 + 612511305.

It is an arithmetic number, because the mean of its divisors is an integer number (612511305).

Almost surely, 2^1225022609 is an apocalyptic number.

It is an amenable number.

1225022609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225022609 is an equidigital number, since it uses as much as digits as its factorization.

1225022609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1225022609 is about 35000.3229842240. The cubic root of 1225022609 is about 1069.9940632040.

The spelling of 1225022609 in words is "one billion, two hundred twenty-five million, twenty-two thousand, six hundred nine".