40401217 has 2 divisors, whose sum is σ = 40401218. Its totient is φ = 40401216.

The previous prime is 40401187. The next prime is 40401223. The reversal of 40401217 is 71210404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38452401 + 1948816 = 6201^2 + 1396^2 .

It is a cyclic number.

It is not a de Polignac number, because 40401217 - 2¹⁹ = 39876929 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40401194 and 40401203.

It is not a weakly prime, because it can be changed into another prime (40401617) 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, 20200608 + 20200609.

It is an arithmetic number, because the mean of its divisors is an integer number (20200609).

Almost surely, 2^40401217 is an apocalyptic number.

It is an amenable number.

40401217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40401217 is an equidigital number, since it uses as much as digits as its factorization.

40401217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 40401217 is about 6356.1951669218. The cubic root of 40401217 is about 343.1348397593.

The spelling of 40401217 in words is "forty million, four hundred one thousand, two hundred seventeen".