121624138 has 8 divisors (see below), whose sum is σ = 190368288. Its totient is φ = 58168044.

The previous prime is 121624127. The next prime is 121624147. The reversal of 121624138 is 831426121.

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

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, 1321956 + ... + 1322047.

It is an arithmetic number, because the mean of its divisors is an integer number (23796036).

Almost surely, 2^121624138 is an apocalyptic number.

121624138 is a deficient number, since it is larger than the sum of its proper divisors (68744150).

121624138 is a wasteful number, since it uses less digits than its factorization.

121624138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644028.

The product of its digits is 2304, while the sum is 28.

The square root of 121624138 is about 11028.3334189713. Note that the first 3 decimals coincide. The cubic root of 121624138 is about 495.4577108428.

The spelling of 121624138 in words is "one hundred twenty-one million, six hundred twenty-four thousand, one hundred thirty-eight".