1225344401 has 2 divisors, whose sum is σ = 1225344402. Its totient is φ = 1225344400.

The previous prime is 1225344359. The next prime is 1225344403. The reversal of 1225344401 is 1044435221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 728946001 + 496398400 = 26999^2 + 22280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225344401 - 2¹⁴ = 1225328017 is a prime.

It is a Sophie Germain prime.

Together with 1225344403, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1225344403) 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, 612672200 + 612672201.

It is an arithmetic number, because the mean of its divisors is an integer number (612672201).

Almost surely, 2^1225344401 is an apocalyptic number.

It is an amenable number.

1225344401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225344401 is an equidigital number, since it uses as much as digits as its factorization.

1225344401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1225344401 is about 35004.9196685266. The cubic root of 1225344401 is about 1070.0877445731.

Adding to 1225344401 its reverse (1044435221), we get a palindrome (2269779622).

The spelling of 1225344401 in words is "one billion, two hundred twenty-five million, three hundred forty-four thousand, four hundred one".