40961161 has 2 divisors, whose sum is σ = 40961162. Its totient is φ = 40961160.

The previous prime is 40961159. The next prime is 40961189. The reversal of 40961161 is 16116904.

It is an a-pointer prime, because the next prime (40961189) can be obtained adding 40961161 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24314761 + 16646400 = 4931^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 40961161 - 2¹ = 40961159 is a prime.

Together with 40961159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40961101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20480580 + 20480581.

It is an arithmetic number, because the mean of its divisors is an integer number (20480581).

Almost surely, 2^40961161 is an apocalyptic number.

It is an amenable number.

40961161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40961161 is an equidigital number, since it uses as much as digits as its factorization.

40961161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 40961161 is about 6400.0907024823. The cubic root of 40961161 is about 344.7128072736.

The spelling of 40961161 in words is "forty million, nine hundred sixty-one thousand, one hundred sixty-one".