40706261 has 2 divisors, whose sum is σ = 40706262. Its totient is φ = 40706260.

The previous prime is 40706233. The next prime is 40706273. The reversal of 40706261 is 16260704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 3129361 = 6130^2 + 1769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40706261 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40706261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40706221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20353130 + 20353131.

It is an arithmetic number, because the mean of its divisors is an integer number (20353131).

Almost surely, 2^40706261 is an apocalyptic number.

It is an amenable number.

40706261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40706261 is an equidigital number, since it uses as much as digits as its factorization.

40706261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 40706261 is about 6380.1458447280. The cubic root of 40706261 is about 343.9962732830.

Adding to 40706261 its reverse (16260704), we get a palindrome (56966965).

The spelling of 40706261 in words is "forty million, seven hundred six thousand, two hundred sixty-one".