23121427 has 8 divisors (see below), whose sum is σ = 26458976. Its totient is φ = 19792512.

The previous prime is 23121421. The next prime is 23121431. The reversal of 23121427 is 72412132.

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 23121427 - 2³ = 23121419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23121398 and 23121407.

It is not an unprimeable number, because it can be changed into a prime (23121421) 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, 5323 + ... + 8635.

It is an arithmetic number, because the mean of its divisors is an integer number (3307372).

Almost surely, 2^23121427 is an apocalyptic number.

23121427 is a deficient number, since it is larger than the sum of its proper divisors (3337549).

23121427 is an equidigital number, since it uses as much as digits as its factorization.

23121427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317.

The product of its digits is 672, while the sum is 22.

The square root of 23121427 is about 4808.4744982167. The cubic root of 23121427 is about 284.8862868400.

Adding to 23121427 its reverse (72412132), we get a palindrome (95533559).

The spelling of 23121427 in words is "twenty-three million, one hundred twenty-one thousand, four hundred twenty-seven".