12240251 has 4 divisors (see below), whose sum is σ = 12524952. Its totient is φ = 11955552.

The previous prime is 12240227. The next prime is 12240271. The reversal of 12240251 is 15204221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15204221 = 73 ⋅208277.

It is a cyclic number.

It is not a de Polignac number, because 12240251 - 2¹⁸ = 11978107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12240271) 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, 142286 + ... + 142371.

It is an arithmetic number, because the mean of its divisors is an integer number (3131238).

Almost surely, 2^12240251 is an apocalyptic number.

12240251 is a deficient number, since it is larger than the sum of its proper divisors (284701).

12240251 is an equidigital number, since it uses as much as digits as its factorization.

12240251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284700.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12240251 is about 3498.6070085107. The cubic root of 12240251 is about 230.4606457972.

Adding to 12240251 its reverse (15204221), we get a palindrome (27444472).

The spelling of 12240251 in words is "twelve million, two hundred forty thousand, two hundred fifty-one".