121604501 has 4 divisors (see below), whose sum is σ = 121871052. Its totient is φ = 121337952.

The previous prime is 121604491. The next prime is 121604521. The reversal of 121604501 is 105406121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51480625 + 70123876 = 7175^2 + 8374^2 .

It is a cyclic number.

It is not a de Polignac number, because 121604501 - 2⁶ = 121604437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121604521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132590 + ... + 133503.

It is an arithmetic number, because the mean of its divisors is an integer number (30467763).

Almost surely, 2^121604501 is an apocalyptic number.

It is an amenable number.

121604501 is a deficient number, since it is larger than the sum of its proper divisors (266551).

121604501 is an equidigital number, since it uses as much as digits as its factorization.

121604501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266550.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 121604501 is about 11027.4430853213. The cubic root of 121604501 is about 495.4310444620.

It can be divided in two parts, 12160 and 4501, that added together give a palindrome (16661).

The spelling of 121604501 in words is "one hundred twenty-one million, six hundred four thousand, five hundred one".