23427121 has 4 divisors (see below), whose sum is σ = 23584500. Its totient is φ = 23269744.

The previous prime is 23427109. The next prime is 23427143. The reversal of 23427121 is 12172432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 20802721 = 1620^2 + 4561^2 .

It is a cyclic number.

It is not a de Polignac number, because 23427121 - 2⁹ = 23426609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23427092 and 23427101.

It is not an unprimeable number, because it can be changed into a prime (23427101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78466 + ... + 78763.

It is an arithmetic number, because the mean of its divisors is an integer number (5896125).

Almost surely, 2^23427121 is an apocalyptic number.

It is an amenable number.

23427121 is a deficient number, since it is larger than the sum of its proper divisors (157379).

23427121 is a wasteful number, since it uses less digits than its factorization.

23427121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157378.

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

The square root of 23427121 is about 4840.1571255487. The cubic root of 23427121 is about 286.1363108842.

Adding to 23427121 its reverse (12172432), we get a palindrome (35599553).

The spelling of 23427121 in words is "twenty-three million, four hundred twenty-seven thousand, one hundred twenty-one".