16040261 has 2 divisors, whose sum is σ = 16040262. Its totient is φ = 16040260.

The previous prime is 16040257. The next prime is 16040267. The reversal of 16040261 is 16204061.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13184161 + 2856100 = 3631^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 16040261 - 2² = 16040257 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16040267) 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, 8020130 + 8020131.

It is an arithmetic number, because the mean of its divisors is an integer number (8020131).

Almost surely, 2^16040261 is an apocalyptic number.

It is an amenable number.

16040261 is a deficient number, since it is larger than the sum of its proper divisors (1).

16040261 is an equidigital number, since it uses as much as digits as its factorization.

16040261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 16040261 is about 4005.0294630627. The cubic root of 16040261 is about 252.1953899521.

The spelling of 16040261 in words is "sixteen million, forty thousand, two hundred sixty-one".