12423511 has 8 divisors (see below), whose sum is σ = 13119920. Its totient is φ = 11731392.

The previous prime is 12423491. The next prime is 12423539. The reversal of 12423511 is 11532421.

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 12423511 - 2⁹ = 12422999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423581) 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, 6211 + ... + 7963.

It is an arithmetic number, because the mean of its divisors is an integer number (1639990).

Almost surely, 2^12423511 is an apocalyptic number.

12423511 is a deficient number, since it is larger than the sum of its proper divisors (696409).

12423511 is a wasteful number, since it uses less digits than its factorization.

12423511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145.

The product of its digits is 240, while the sum is 19.

The square root of 12423511 is about 3524.7001290890. The cubic root of 12423511 is about 231.6050988563.

Adding to 12423511 its reverse (11532421), we get a palindrome (23955932).

It can be divided in two parts, 1242 and 3511, that added together give a triangular number (4753 = T₉₇).

The spelling of 12423511 in words is "twelve million, four hundred twenty-three thousand, five hundred eleven".