12257530 has 16 divisors (see below), whose sum is σ = 22105224. Its totient is φ = 4893760.

The previous prime is 12257521. The next prime is 12257533. The reversal of 12257530 is 3575221.

It can be written as a sum of positive squares in 4 ways, for example, as 10647169 + 1610361 = 3263^2 + 1269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12257495 and 12257504.

It is not an unprimeable number, because it can be changed into a prime (12257533) 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 7 ways as a sum of consecutive naturals, for example, 7464 + ... + 8956.

Almost surely, 2^12257530 is an apocalyptic number.

12257530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12257530 is a deficient number, since it is larger than the sum of its proper divisors (9847694).

12257530 is a wasteful number, since it uses less digits than its factorization.

12257530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 12257530 is about 3501.0755490278. The cubic root of 12257530 is about 230.5690383775.

It can be divided in two parts, 12257 and 530, that multiplied together give a triangular number (6496210 = T₃₆₀₄).

The spelling of 12257530 in words is "twelve million, two hundred fifty-seven thousand, five hundred thirty".