1213304125 has 32 divisors (see below), whose sum is σ = 1690356096. Its totient is φ = 861840000.

The previous prime is 1213304087. The next prime is 1213304129. The reversal of 1213304125 is 5214033121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1213304125 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213304096 and 1213304105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213304129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48865 + ... + 69385.

It is an arithmetic number, because the mean of its divisors is an integer number (52823628).

Almost surely, 2^1213304125 is an apocalyptic number.

It is an amenable number.

1213304125 is a deficient number, since it is larger than the sum of its proper divisors (477051971).

1213304125 is a wasteful number, since it uses less digits than its factorization.

1213304125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20590 (or 20580 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1213304125 is about 34832.5153412727. The cubic root of 1213304125 is about 1066.5712954553.

Adding to 1213304125 its reverse (5214033121), we get a palindrome (6427337246).

The spelling of 1213304125 in words is "one billion, two hundred thirteen million, three hundred four thousand, one hundred twenty-five".