12240541 has 4 divisors (see below), whose sum is σ = 12884800. Its totient is φ = 11596284.

The previous prime is 12240511. The next prime is 12240559. The reversal of 12240541 is 14504221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12240541 - 2⁷ = 12240413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 644239 = 12240541 / (1 + 2 + 2 + 4 + 0 + 5 + 4 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12240511) 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, 322101 + ... + 322138.

It is an arithmetic number, because the mean of its divisors is an integer number (3221200).

Almost surely, 2^12240541 is an apocalyptic number.

It is an amenable number.

12240541 is a deficient number, since it is larger than the sum of its proper divisors (644259).

12240541 is an equidigital number, since it uses as much as digits as its factorization.

12240541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644258.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 12240541 is about 3498.6484533317. The cubic root of 12240541 is about 230.4624658323.

Adding to 12240541 its reverse (14504221), we get a palindrome (26744762).

The spelling of 12240541 in words is "twelve million, two hundred forty thousand, five hundred forty-one".