121724585 has 8 divisors (see below), whose sum is σ = 148464456. Its totient is φ = 95783040.

The previous prime is 121724509. The next prime is 121724593. The reversal of 121724585 is 585427121.

It can be written as a sum of positive squares in 4 ways, for example, as 6205081 + 115519504 = 2491^2 + 10748^2 .

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

It is not a de Polignac number, because 121724585 - 2⁸ = 121724329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199244 + ... + 199853.

It is an arithmetic number, because the mean of its divisors is an integer number (18558057).

Almost surely, 2^121724585 is an apocalyptic number.

It is an amenable number.

121724585 is a deficient number, since it is larger than the sum of its proper divisors (26739871).

121724585 is an equidigital number, since it uses as much as digits as its factorization.

121724585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399163.

The product of its digits is 22400, while the sum is 35.

The square root of 121724585 is about 11032.8865216678. The cubic root of 121724585 is about 495.5940695930.

The spelling of 121724585 in words is "one hundred twenty-one million, seven hundred twenty-four thousand, five hundred eighty-five".