1225440343 has 2 divisors, whose sum is σ = 1225440344. Its totient is φ = 1225440342.

The previous prime is 1225440341. The next prime is 1225440367. The reversal of 1225440343 is 3430445221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225440343 - 2¹ = 1225440341 is a prime.

Together with 1225440341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225440341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612720171 + 612720172.

It is an arithmetic number, because the mean of its divisors is an integer number (612720172).

Almost surely, 2^1225440343 is an apocalyptic number.

1225440343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225440343 is an equidigital number, since it uses as much as digits as its factorization.

1225440343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1225440343 is about 35006.2900490755. The cubic root of 1225440343 is about 1070.1156724163.

Adding to 1225440343 its reverse (3430445221), we get a palindrome (4655885564).

The spelling of 1225440343 in words is "one billion, two hundred twenty-five million, four hundred forty thousand, three hundred forty-three".