40008541 has 2 divisors, whose sum is σ = 40008542. Its totient is φ = 40008540.

The previous prime is 40008503. The next prime is 40008557. The reversal of 40008541 is 14580004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 2916 = 6325^2 + 54^2 .

It is a cyclic number.

It is not a de Polignac number, because 40008541 - 2⁷ = 40008413 is a prime.

It is equal to p_2434153 and since 40008541 and 2434153 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40003541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20004270 + 20004271.

It is an arithmetic number, because the mean of its divisors is an integer number (20004271).

Almost surely, 2^40008541 is an apocalyptic number.

It is an amenable number.

40008541 is a deficient number, since it is larger than the sum of its proper divisors (1).

40008541 is an equidigital number, since it uses as much as digits as its factorization.

40008541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 40008541 is about 6325.2305096336. The cubic root of 40008541 is about 342.0195291106.

Adding to 40008541 its reverse (14580004), we get a palindrome (54588545).

The spelling of 40008541 in words is "forty million, eight thousand, five hundred forty-one".