121623 has 8 divisors (see below), whose sum is σ = 164736. Its totient is φ = 79800.

The previous prime is 121621. The next prime is 121631. The reversal of 121623 is 326121.

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

It is not a de Polignac number, because 121623 - 2¹ = 121621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73 + ... + 498.

It is an arithmetic number, because the mean of its divisors is an integer number (20592).

2¹²¹⁶²³ is an apocalyptic number.

121623 is a deficient number, since it is larger than the sum of its proper divisors (43113).

121623 is an equidigital number, since it uses as much as digits as its factorization.

121623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645.

The product of its digits is 72, while the sum is 15.

The square root of 121623 is about 348.7448924357. The cubic root of 121623 is about 49.5456165556.

Adding to 121623 its reverse (326121), we get a palindrome (447744).

The spelling of 121623 in words is "one hundred twenty-one thousand, six hundred twenty-three".