121542616 has 32 divisors (see below), whose sum is σ = 246355200. Its totient is φ = 55883520.

The previous prime is 121542613. The next prime is 121542643. The reversal of 121542616 is 616245121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121542613) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 27145 + ... + 31303.

It is an arithmetic number, because the mean of its divisors is an integer number (7698600).

Almost surely, 2^121542616 is an apocalyptic number.

It is an amenable number.

121542616 is an abundant number, since it is smaller than the sum of its proper divisors (124812584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121542616 is a wasteful number, since it uses less digits than its factorization.

121542616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459 (or 4455 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 121542616 is about 11024.6367740620. The cubic root of 121542616 is about 495.3469879445.

Adding to 121542616 its reverse (616245121), we get a palindrome (737787737).

The spelling of 121542616 in words is "one hundred twenty-one million, five hundred forty-two thousand, six hundred sixteen".