1225344403 has 2 divisors, whose sum is σ = 1225344404. Its totient is φ = 1225344402.

The previous prime is 1225344401. The next prime is 1225344413. The reversal of 1225344403 is 3044435221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1225344403 - 2¹ = 1225344401 is a prime.

Together with 1225344401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1225344401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612672201 + 612672202.

It is an arithmetic number, because the mean of its divisors is an integer number (612672202).

Almost surely, 2^1225344403 is an apocalyptic number.

1225344403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225344403 is an equidigital number, since it uses as much as digits as its factorization.

1225344403 is an evil number, because the sum of its binary digits is even.

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

The square root of 1225344403 is about 35004.9196970940. The cubic root of 1225344403 is about 1070.0877451553.

Adding to 1225344403 its reverse (3044435221), we get a palindrome (4269779624).

The spelling of 1225344403 in words is "one billion, two hundred twenty-five million, three hundred forty-four thousand, four hundred three".