1225440403 has 4 divisors (see below), whose sum is σ = 1336844088. Its totient is φ = 1114036720.

The previous prime is 1225440371. The next prime is 1225440467. The reversal of 1225440403 is 3040445221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1225440403 - 2⁵ = 1225440371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225470403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55701826 + ... + 55701847.

It is an arithmetic number, because the mean of its divisors is an integer number (334211022).

Almost surely, 2^1225440403 is an apocalyptic number.

1225440403 is a deficient number, since it is larger than the sum of its proper divisors (111403685).

1225440403 is a wasteful number, since it uses less digits than its factorization.

1225440403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111403684.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1225440403 is about 35006.2909060643. The cubic root of 1225440403 is about 1070.1156898813.

Adding to 1225440403 its reverse (3040445221), we get a palindrome (4265885624).

The spelling of 1225440403 in words is "one billion, two hundred twenty-five million, four hundred forty thousand, four hundred three".