12661634 has 8 divisors (see below), whose sum is σ = 20109708. Its totient is φ = 5958400.

The previous prime is 12661633. The next prime is 12661637. The reversal of 12661634 is 43616621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12271009 + 390625 = 3503^2 + 625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 12661597 and 12661606.

It is not an unprimeable number, because it can be changed into a prime (12661633) 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, 186167 + ... + 186234.

Almost surely, 2^12661634 is an apocalyptic number.

12661634 is a deficient number, since it is larger than the sum of its proper divisors (7448074).

12661634 is a wasteful number, since it uses less digits than its factorization.

12661634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372420.

The product of its digits is 5184, while the sum is 29.

The square root of 12661634 is about 3558.3189851389. The cubic root of 12661634 is about 233.0754788713.

The spelling of 12661634 in words is "twelve million, six hundred sixty-one thousand, six hundred thirty-four".