12251646 has 48 divisors (see below), whose sum is σ = 29652480. Its totient is φ = 3623760.

The previous prime is 12251641. The next prime is 12251647. The reversal of 12251646 is 64615221.

12251646 is a `hidden beast` number, since 12 + 2 + 5 + 1 + 646 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251641) 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 23 ways as a sum of consecutive naturals, for example, 7795 + ... + 9233.

It is an arithmetic number, because the mean of its divisors is an integer number (617760).

Almost surely, 2^12251646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12251646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14826240).

12251646 is an abundant number, since it is smaller than the sum of its proper divisors (17400834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12251646 is a wasteful number, since it uses less digits than its factorization.

12251646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1498 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12251646 is about 3500.2351349588. The cubic root of 12251646 is about 230.5321390087.

Adding to 12251646 its reverse (64615221), we get a palindrome (76866867).

The spelling of 12251646 in words is "twelve million, two hundred fifty-one thousand, six hundred forty-six".