40715861 has 2 divisors, whose sum is σ = 40715862. Its totient is φ = 40715860.

The previous prime is 40715839. The next prime is 40715863. The reversal of 40715861 is 16851704.

It is a happy number.

40715861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32706961 + 8008900 = 5719^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 40715861 - 2²² = 36521557 is a prime.

Together with 40715863, 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 (40715863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20357930 + 20357931.

It is an arithmetic number, because the mean of its divisors is an integer number (20357931).

Almost surely, 2^40715861 is an apocalyptic number.

It is an amenable number.

40715861 is a deficient number, since it is larger than the sum of its proper divisors (1).

40715861 is an equidigital number, since it uses as much as digits as its factorization.

40715861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 40715861 is about 6380.8981342755. The cubic root of 40715861 is about 344.0233133875.

The spelling of 40715861 in words is "forty million, seven hundred fifteen thousand, eight hundred sixty-one".