40256617 has 2 divisors, whose sum is σ = 40256618. Its totient is φ = 40256616.

The previous prime is 40256591. The next prime is 40256639. The reversal of 40256617 is 71665204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25694761 + 14561856 = 5069^2 + 3816^2 .

It is a cyclic number.

It is not a de Polignac number, because 40256617 - 2²³ = 31868009 is a prime.

It is not a weakly prime, because it can be changed into another prime (40256677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20128308 + 20128309.

It is an arithmetic number, because the mean of its divisors is an integer number (20128309).

Almost surely, 2^40256617 is an apocalyptic number.

It is an amenable number.

40256617 is a deficient number, since it is larger than the sum of its proper divisors (1).

40256617 is an equidigital number, since it uses as much as digits as its factorization.

40256617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 40256617 is about 6344.8102414493. The cubic root of 40256617 is about 342.7249790785.

The spelling of 40256617 in words is "forty million, two hundred fifty-six thousand, six hundred seventeen".