12106513 has 4 divisors (see below), whose sum is σ = 12259840. Its totient is φ = 11953188.

The previous prime is 12106459. The next prime is 12106531. The reversal of 12106513 is 31560121.

12106513 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31560121 = 19 ⋅1661059.

It is a cyclic number.

It is not a de Polignac number, because 12106513 - 2¹⁷ = 11975441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12106573) 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, 76545 + ... + 76702.

It is an arithmetic number, because the mean of its divisors is an integer number (3064960).

Almost surely, 2^12106513 is an apocalyptic number.

It is an amenable number.

12106513 is a deficient number, since it is larger than the sum of its proper divisors (153327).

12106513 is an equidigital number, since it uses as much as digits as its factorization.

12106513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153326.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 12106513 is about 3479.4414781686. The cubic root of 12106513 is about 229.6182261327.

Adding to 12106513 its reverse (31560121), we get a palindrome (43666634).

The spelling of 12106513 in words is "twelve million, one hundred six thousand, five hundred thirteen".