12356513 has 4 divisors (see below), whose sum is σ = 13307028. Its totient is φ = 11406000.

The previous prime is 12356503. The next prime is 12356551. The reversal of 12356513 is 31565321.

12356513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4700224 + 7656289 = 2168^2 + 2767^2 .

It is a cyclic number.

It is not a de Polignac number, because 12356513 - 2¹⁶ = 12290977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12356503) 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, 475238 + ... + 475263.

It is an arithmetic number, because the mean of its divisors is an integer number (3326757).

Almost surely, 2^12356513 is an apocalyptic number.

12356513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12356513 is a deficient number, since it is larger than the sum of its proper divisors (950515).

12356513 is an equidigital number, since it uses as much as digits as its factorization.

12356513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950514.

The product of its digits is 2700, while the sum is 26.

The square root of 12356513 is about 3515.1832100191. The cubic root of 12356513 is about 231.1880118244.

The spelling of 12356513 in words is "twelve million, three hundred fifty-six thousand, five hundred thirteen".