12430521 has 12 divisors (see below), whose sum is σ = 18015972. Its totient is φ = 8258976.

The previous prime is 12430507. The next prime is 12430547. The reversal of 12430521 is 12503421.

It can be written as a sum of positive squares in 2 ways, for example, as 7502121 + 4928400 = 2739^2 + 2220^2 .

It is not a de Polignac number, because 12430521 - 2⁵ = 12430489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12430494 and 12430503.

It is not an unprimeable number, because it can be changed into a prime (12430501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 675 + ... + 5031.

It is an arithmetic number, because the mean of its divisors is an integer number (1501331).

Almost surely, 2^12430521 is an apocalyptic number.

It is an amenable number.

12430521 is a deficient number, since it is larger than the sum of its proper divisors (5585451).

12430521 is a wasteful number, since it uses less digits than its factorization.

12430521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680 (or 4677 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 12430521 is about 3525.6943996892. The cubic root of 12430521 is about 231.6486519355.

Adding to 12430521 its reverse (12503421), we get a palindrome (24933942).

Subtracting 12430521 from its reverse (12503421), we obtain a square (72900 = 270²).

The spelling of 12430521 in words is "twelve million, four hundred thirty thousand, five hundred twenty-one".