40100261 has 2 divisors, whose sum is σ = 40100262. Its totient is φ = 40100260.

The previous prime is 40100257. The next prime is 40100299. The reversal of 40100261 is 16200104.

40100261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31427236 + 8673025 = 5606^2 + 2945^2 .

It is a cyclic number.

It is not a de Polignac number, because 40100261 - 2² = 40100257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40100861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20050130 + 20050131.

It is an arithmetic number, because the mean of its divisors is an integer number (20050131).

Almost surely, 2^40100261 is an apocalyptic number.

It is an amenable number.

40100261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40100261 is an equidigital number, since it uses as much as digits as its factorization.

40100261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 40100261 is about 6332.4766876792. The cubic root of 40100261 is about 342.2806907599.

Adding to 40100261 its reverse (16200104), we get a palindrome (56300365).

The spelling of 40100261 in words is "forty million, one hundred thousand, two hundred sixty-one".