12121654 has 8 divisors (see below), whose sum is σ = 18199368. Its totient is φ = 6055200.

The previous prime is 12121631. The next prime is 12121661. The reversal of 12121654 is 45612121.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814 + ... + 4990.

It is an arithmetic number, because the mean of its divisors is an integer number (2274921).

Almost surely, 2^12121654 is an apocalyptic number.

12121654 is a deficient number, since it is larger than the sum of its proper divisors (6077714).

12121654 is a wasteful number, since it uses less digits than its factorization.

12121654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5630.

The product of its digits is 480, while the sum is 22.

The square root of 12121654 is about 3481.6165785451. The cubic root of 12121654 is about 229.7139101999.

Adding to 12121654 its reverse (45612121), we get a palindrome (57733775).

The spelling of 12121654 in words is "twelve million, one hundred twenty-one thousand, six hundred fifty-four".