121537648 has 20 divisors (see below), whose sum is σ = 236051608. Its totient is φ = 60621120.

The previous prime is 121537621. The next prime is 121537649. The reversal of 121537648 is 846735121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121537649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2286 + ... + 15757.

Almost surely, 2^121537648 is an apocalyptic number.

It is an amenable number.

121537648 is a deficient number, since it is larger than the sum of its proper divisors (114513960).

121537648 is a wasteful number, since it uses less digits than its factorization.

121537648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18472 (or 18466 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 121537648 is about 11024.4114582140. The cubic root of 121537648 is about 495.3402388237.

The spelling of 121537648 in words is "one hundred twenty-one million, five hundred thirty-seven thousand, six hundred forty-eight".