12212461 has 4 divisors (see below), whose sum is σ = 12275932. Its totient is φ = 12148992.

The previous prime is 12212441. The next prime is 12212467. The reversal of 12212461 is 16421221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1223236 + 10989225 = 1106^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212461 - 2⁵ = 12212429 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 (12212467) 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, 31446 + ... + 31831.

It is an arithmetic number, because the mean of its divisors is an integer number (3068983).

Almost surely, 2^12212461 is an apocalyptic number.

It is an amenable number.

12212461 is a deficient number, since it is larger than the sum of its proper divisors (63471).

12212461 is an equidigital number, since it uses as much as digits as its factorization.

12212461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63470.

The product of its digits is 192, while the sum is 19.

The square root of 12212461 is about 3494.6331710210. The cubic root of 12212461 is about 230.2861026894.

Adding to 12212461 its reverse (16421221), we get a palindrome (28633682).

The spelling of 12212461 in words is "twelve million, two hundred twelve thousand, four hundred sixty-one".