13012651 has 4 divisors (see below), whose sum is σ = 13020304. Its totient is φ = 13005000.

The previous prime is 13012609. The next prime is 13012669. The reversal of 13012651 is 15621031.

13012651 is a nontrivial binomial coefficient, being equal to C(5102, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 15621031 = 3203 ⋅4877.

It is a 3-Lehmer number, since φ(13012651) divides (13012651-1)³.

It is a cyclic number.

It is not a de Polignac number, because 13012651 - 2⁷ = 13012523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13012691) 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 3 ways as a sum of consecutive naturals, for example, 1 + ... + 5101.

It is an arithmetic number, because the mean of its divisors is an integer number (3255076).

Almost surely, 2^13012651 is an apocalyptic number.

13012651 is the 5101-st triangular number and also the 2551-st hexagonal number.

13012651 is the 1701-st centered nonagonal number.

13012651 is a deficient number, since it is larger than the sum of its proper divisors (7653).

13012651 is an equidigital number, since it uses as much as digits as its factorization.

13012651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7652.

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

The square root of 13012651 is about 3607.3052268972. The cubic root of 13012651 is about 235.2097177233.

Adding to 13012651 its reverse (15621031), we get a palindrome (28633682).

The spelling of 13012651 in words is "thirteen million, twelve thousand, six hundred fifty-one".