12506251 has 4 divisors (see below), whose sum is σ = 12742272. Its totient is φ = 12270232.

The previous prime is 12506239. The next prime is 12506257. The reversal of 12506251 is 15260521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12506251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12506257) 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, 117931 + ... + 118036.

It is an arithmetic number, because the mean of its divisors is an integer number (3185568).

Almost surely, 2^12506251 is an apocalyptic number.

12506251 is a deficient number, since it is larger than the sum of its proper divisors (236021).

12506251 is an equidigital number, since it uses as much as digits as its factorization.

12506251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236020.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 12506251 is about 3536.4178203374. The cubic root of 12506251 is about 232.1181213294.

Adding to 12506251 its reverse (15260521), we get a palindrome (27766772).

The spelling of 12506251 in words is "twelve million, five hundred six thousand, two hundred fifty-one".