23065421 has 2 divisors, whose sum is σ = 23065422. Its totient is φ = 23065420.

The previous prime is 23065397. The next prime is 23065423. The reversal of 23065421 is 12456032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 2941225 = 4486^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 23065421 - 2¹⁰ = 23064397 is a prime.

Together with 23065423, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1452119 and since 23065421 and 1452119 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23065423) 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 as a sum of consecutive naturals, namely, 11532710 + 11532711.

It is an arithmetic number, because the mean of its divisors is an integer number (11532711).

Almost surely, 2^23065421 is an apocalyptic number.

It is an amenable number.

23065421 is a deficient number, since it is larger than the sum of its proper divisors (1).

23065421 is an equidigital number, since it uses as much as digits as its factorization.

23065421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 23065421 is about 4802.6472908178. The cubic root of 23065421 is about 284.6560784222.

The spelling of 23065421 in words is "twenty-three million, sixty-five thousand, four hundred twenty-one".