121604003 has 4 divisors (see below), whose sum is σ = 121628640. Its totient is φ = 121579368.

The previous prime is 121603987. The next prime is 121604029. The reversal of 121604003 is 300406121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300406121 = 607 ⋅494903.

It is a cyclic number.

It is not a de Polignac number, because 121604003 - 2⁴ = 121603987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121604033) 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 3 ways as a sum of consecutive naturals, for example, 2075 + ... + 15732.

It is an arithmetic number, because the mean of its divisors is an integer number (30407160).

Almost surely, 2^121604003 is an apocalyptic number.

121604003 is a deficient number, since it is larger than the sum of its proper divisors (24637).

121604003 is an equidigital number, since it uses as much as digits as its factorization.

121604003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24636.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121604003 is about 11027.4205052678. The cubic root of 121604003 is about 495.4303681576.

The spelling of 121604003 in words is "one hundred twenty-one million, six hundred four thousand, three".