12621251 has 2 divisors, whose sum is σ = 12621252. Its totient is φ = 12621250.

The previous prime is 12621241. The next prime is 12621269. The reversal of 12621251 is 15212621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12621251 - 2¹⁸ = 12359107 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12621241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310625 + 6310626.

It is an arithmetic number, because the mean of its divisors is an integer number (6310626).

Almost surely, 2^12621251 is an apocalyptic number.

12621251 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621251 is an equidigital number, since it uses as much as digits as its factorization.

12621251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 12621251 is about 3552.6400042785. The cubic root of 12621251 is about 232.8274247538.

Adding to 12621251 its reverse (15212621), we get a palindrome (27833872).

The spelling of 12621251 in words is "twelve million, six hundred twenty-one thousand, two hundred fifty-one".