23409121 has 8 divisors (see below), whose sum is σ = 24688800. Its totient is φ = 22134240.

The previous prime is 23409109. The next prime is 23409131. The reversal of 23409121 is 12190432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23409121 - 2¹³ = 23400929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23409092 and 23409101.

It is not an unprimeable number, because it can be changed into a prime (23409131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13650 + ... + 15268.

It is an arithmetic number, because the mean of its divisors is an integer number (3086100).

Almost surely, 2^23409121 is an apocalyptic number.

It is an amenable number.

23409121 is a deficient number, since it is larger than the sum of its proper divisors (1279679).

23409121 is a wasteful number, since it uses less digits than its factorization.

23409121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 23409121 is about 4838.2973244727. The cubic root of 23409121 is about 286.0630087592.

Adding to 23409121 its reverse (12190432), we get a palindrome (35599553).

It can be divided in two parts, 23409 and 121, that multiplied together give a square (2832489 = 1683²).

The spelling of 23409121 in words is "twenty-three million, four hundred nine thousand, one hundred twenty-one".