123421523 has 2 divisors, whose sum is σ = 123421524. Its totient is φ = 123421522.

The previous prime is 123421499. The next prime is 123421541. The reversal of 123421523 is 325124321.

It is a strong prime.

It is an emirp because it is prime and its reverse (325124321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123421523 - 2¹⁶ = 123355987 is a prime.

It is not a weakly prime, because it can be changed into another prime (123421553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61710761 + 61710762.

It is an arithmetic number, because the mean of its divisors is an integer number (61710762).

Almost surely, 2^123421523 is an apocalyptic number.

123421523 is a deficient number, since it is larger than the sum of its proper divisors (1).

123421523 is an equidigital number, since it uses as much as digits as its factorization.

123421523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 23.

The square root of 123421523 is about 11109.5239772008. The cubic root of 123421523 is about 497.8864423367.

Adding to 123421523 its reverse (325124321), we get a palindrome (448545844).

The spelling of 123421523 in words is "one hundred twenty-three million, four hundred twenty-one thousand, five hundred twenty-three".