12351661 has 8 divisors (see below), whose sum is σ = 14207360. Its totient is φ = 10518768.

The previous prime is 12351659. The next prime is 12351727. The reversal of 12351661 is 16615321.

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

It is a cyclic number.

It is not a de Polignac number, because 12351661 - 2¹ = 12351659 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 (12351601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4521 + ... + 6718.

It is an arithmetic number, because the mean of its divisors is an integer number (1775920).

Almost surely, 2^12351661 is an apocalyptic number.

It is an amenable number.

12351661 is a deficient number, since it is larger than the sum of its proper divisors (1855699).

12351661 is a wasteful number, since it uses less digits than its factorization.

12351661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11403.

The product of its digits is 1080, while the sum is 25.

The square root of 12351661 is about 3514.4929933064. The cubic root of 12351661 is about 231.1577478633.

Adding to 12351661 its reverse (16615321), we get a palindrome (28966982).

The spelling of 12351661 in words is "twelve million, three hundred fifty-one thousand, six hundred sixty-one".