121503 has 8 divisors (see below), whose sum is σ = 164016. Its totient is φ = 80000.

The previous prime is 121501. The next prime is 121507. The reversal of 121503 is 305121.

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

It is a cyclic number.

It is not a de Polignac number, because 121503 - 2¹ = 121501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (20502).

2¹²¹⁵⁰³ is an apocalyptic number.

121503 is a deficient number, since it is larger than the sum of its proper divisors (42513).

121503 is a wasteful number, since it uses less digits than its factorization.

121503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 121503 is about 348.5728044469. The cubic root of 121503 is about 49.5293163754.

Adding to 121503 its reverse (305121), we get a palindrome (426624).

The spelling of 121503 in words is "one hundred twenty-one thousand, five hundred three".