12520343 has 4 divisors (see below), whose sum is σ = 13658568. Its totient is φ = 11382120.

The previous prime is 12520337. The next prime is 12520351. The reversal of 12520343 is 34302521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34302521 = 11 ⋅3118411.

It is a cyclic number.

It is not a de Polignac number, because 12520343 - 2¹² = 12516247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520043) 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, 569096 + ... + 569117.

It is an arithmetic number, because the mean of its divisors is an integer number (3414642).

Almost surely, 2^12520343 is an apocalyptic number.

12520343 is a deficient number, since it is larger than the sum of its proper divisors (1138225).

12520343 is a wasteful number, since it uses less digits than its factorization.

12520343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138224.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 12520343 is about 3538.4096710245. The cubic root of 12520343 is about 232.2052719005.

Adding to 12520343 its reverse (34302521), we get a palindrome (46822864).

The spelling of 12520343 in words is "twelve million, five hundred twenty thousand, three hundred forty-three".