121620587 has 16 divisors (see below), whose sum is σ = 134866944. Its totient is φ = 108756000.

The previous prime is 121620581. The next prime is 121620599. The reversal of 121620587 is 785026121.

It is a cyclic number.

It is not a de Polignac number, because 121620587 - 2⁴ = 121620571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121620581) 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 15 ways as a sum of consecutive naturals, for example, 224537 + ... + 225077.

It is an arithmetic number, because the mean of its divisors is an integer number (8429184).

Almost surely, 2^121620587 is an apocalyptic number.

121620587 is a deficient number, since it is larger than the sum of its proper divisors (13246357).

121620587 is a wasteful number, since it uses less digits than its factorization.

121620587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 121620587 is about 11028.1724233891. The cubic root of 121620587 is about 495.4528889177.

The spelling of 121620587 in words is "one hundred twenty-one million, six hundred twenty thousand, five hundred eighty-seven".