12252661 has 4 divisors (see below), whose sum is σ = 12583852. Its totient is φ = 11921472.

The previous prime is 12252659. The next prime is 12252671. The reversal of 12252661 is 16625221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16625221 = 337 ⋅49333.

It can be written as a sum of positive squares in 2 ways, for example, as 11350161 + 902500 = 3369^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 12252661 - 2¹ = 12252659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12252641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165540 + ... + 165613.

It is an arithmetic number, because the mean of its divisors is an integer number (3145963).

Almost surely, 2^12252661 is an apocalyptic number.

It is an amenable number.

12252661 is a deficient number, since it is larger than the sum of its proper divisors (331191).

12252661 is an equidigital number, since it uses as much as digits as its factorization.

12252661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331190.

The product of its digits is 1440, while the sum is 25.

The square root of 12252661 is about 3500.3801222153. The cubic root of 12252661 is about 230.5385050556.

Adding to 12252661 its reverse (16625221), we get a palindrome (28877882).

The spelling of 12252661 in words is "twelve million, two hundred fifty-two thousand, six hundred sixty-one".