40262161 has 2 divisors, whose sum is σ = 40262162. Its totient is φ = 40262160.

The previous prime is 40262153. The next prime is 40262177. The reversal of 40262161 is 16126204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40259025 + 3136 = 6345^2 + 56^2 .

It is a cyclic number.

It is not a de Polignac number, because 40262161 - 2³ = 40262153 is a prime.

It is not a weakly prime, because it can be changed into another prime (40262191) 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, 20131080 + 20131081.

It is an arithmetic number, because the mean of its divisors is an integer number (20131081).

Almost surely, 2^40262161 is an apocalyptic number.

It is an amenable number.

40262161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40262161 is an equidigital number, since it uses as much as digits as its factorization.

40262161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40262161 is about 6345.2471189072. The cubic root of 40262161 is about 342.7407113168.

Adding to 40262161 its reverse (16126204), we get a palindrome (56388365).

The spelling of 40262161 in words is "forty million, two hundred sixty-two thousand, one hundred sixty-one".