12400541 has 2 divisors, whose sum is σ = 12400542. Its totient is φ = 12400540.

The previous prime is 12400517. The next prime is 12400543. The reversal of 12400541 is 14500421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11874916 + 525625 = 3446^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400541 - 2¹⁴ = 12384157 is a prime.

Together with 12400543, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12400543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200270 + 6200271.

It is an arithmetic number, because the mean of its divisors is an integer number (6200271).

Almost surely, 2^12400541 is an apocalyptic number.

It is an amenable number.

12400541 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400541 is an equidigital number, since it uses as much as digits as its factorization.

12400541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12400541 is about 3521.4401883320. The cubic root of 12400541 is about 231.4622715130.

Adding to 12400541 its reverse (14500421), we get a palindrome (26900962).

The spelling of 12400541 in words is "twelve million, four hundred thousand, five hundred forty-one".