1225305513 has 12 divisors (see below), whose sum is σ = 1774218420. Its totient is φ = 814870656.

The previous prime is 1225305503. The next prime is 1225305539. The reversal of 1225305513 is 3155035221.

It is a happy number.

1225305513 is a `hidden beast` number, since 122 + 530 + 5 + 5 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 489648384 + 735657129 = 22128^2 + 27123^2 .

It is not a de Polignac number, because 1225305513 - 2¹⁴ = 1225289129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225305503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162756 + ... + 170117.

It is an arithmetic number, because the mean of its divisors is an integer number (147851535).

Almost surely, 2^1225305513 is an apocalyptic number.

It is an amenable number.

1225305513 is a deficient number, since it is larger than the sum of its proper divisors (548912907).

1225305513 is a wasteful number, since it uses less digits than its factorization.

1225305513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333288 (or 333285 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 1225305513 is about 35004.3641993395. The cubic root of 1225305513 is about 1070.0764242149.

The spelling of 1225305513 in words is "one billion, two hundred twenty-five million, three hundred five thousand, five hundred thirteen".