1225206061 has 2 divisors, whose sum is σ = 1225206062. Its totient is φ = 1225206060.

The previous prime is 1225206041. The next prime is 1225206071. The reversal of 1225206061 is 1606025221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625250025 + 599956036 = 25005^2 + 24494^2 .

It is an emirp because it is prime and its reverse (1606025221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225206061 - 2⁵ = 1225206029 is a prime.

It is a super-2 number, since 2×1225206061² = 3002259783822271442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225206041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612603030 + 612603031.

It is an arithmetic number, because the mean of its divisors is an integer number (612603031).

Almost surely, 2^1225206061 is an apocalyptic number.

It is an amenable number.

1225206061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225206061 is an equidigital number, since it uses as much as digits as its factorization.

1225206061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1225206061 is about 35002.9436047884. The cubic root of 1225206061 is about 1070.0474724913.

The spelling of 1225206061 in words is "one billion, two hundred twenty-five million, two hundred six thousand, sixty-one".