121604566 has 8 divisors (see below), whose sum is σ = 182456424. Its totient is φ = 60785760.

The previous prime is 121604551. The next prime is 121604591. The reversal of 121604566 is 665406121.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5566 + ... + 16558.

It is an arithmetic number, because the mean of its divisors is an integer number (22807053).

Almost surely, 2^121604566 is an apocalyptic number.

121604566 is a deficient number, since it is larger than the sum of its proper divisors (60851858).

121604566 is a wasteful number, since it uses less digits than its factorization.

121604566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16526.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 121604566 is about 11027.4460325136. The cubic root of 121604566 is about 495.4311327345.

The spelling of 121604566 in words is "one hundred twenty-one million, six hundred four thousand, five hundred sixty-six".