121523 has 2 divisors, whose sum is σ = 121524. Its totient is φ = 121522.

The previous prime is 121507. The next prime is 121531. The reversal of 121523 is 325121.

It is a happy number.

It is a strong prime.

121523 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 121523 - 2⁴ = 121507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121498 and 121507.

It is not a weakly prime, because it can be changed into another prime (121553) 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 as a sum of consecutive naturals, namely, 60761 + 60762.

It is an arithmetic number, because the mean of its divisors is an integer number (60762).

2¹²¹⁵²³ is an apocalyptic number.

121523 is a deficient number, since it is larger than the sum of its proper divisors (1).

121523 is an equidigital number, since it uses as much as digits as its factorization.

121523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 14.

The square root of 121523 is about 348.6014916778. The cubic root of 121523 is about 49.5320338172.

Adding to 121523 its reverse (325121), we get a palindrome (446644).

The spelling of 121523 in words is "one hundred twenty-one thousand, five hundred twenty-three".