12261630 has 32 divisors (see below), whose sum is σ = 29696544. Its totient is φ = 3239936.

The previous prime is 12261617. The next prime is 12261649. The reversal of 12261630 is 3616221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12261597 and 12261606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1582 + ... + 5198.

It is an arithmetic number, because the mean of its divisors is an integer number (928017).

Almost surely, 2^12261630 is an apocalyptic number.

12261630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12261630 is an abundant number, since it is smaller than the sum of its proper divisors (17434914).

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

12261630 is a wasteful number, since it uses less digits than its factorization.

12261630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 12261630 is about 3501.6610344235. The cubic root of 12261630 is about 230.5947430580.

Adding to 12261630 its reverse (3616221), we get a palindrome (15877851).

The spelling of 12261630 in words is "twelve million, two hundred sixty-one thousand, six hundred thirty".