262406681 has 2 divisors, whose sum is σ = 262406682. Its totient is φ = 262406680.

The previous prime is 262406633. The next prime is 262406717. The reversal of 262406681 is 186604262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209989081 + 52417600 = 14491^2 + 7240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-262406681 is a prime.

It is a super-2 number, since 2×262406681² = 137714532466871522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (262406381) 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, 131203340 + 131203341.

It is an arithmetic number, because the mean of its divisors is an integer number (131203341).

Almost surely, 2^262406681 is an apocalyptic number.

It is an amenable number.

262406681 is a deficient number, since it is larger than the sum of its proper divisors (1).

262406681 is an equidigital number, since it uses as much as digits as its factorization.

262406681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 262406681 is about 16198.9716031605. The cubic root of 262406681 is about 640.2136989820.

The spelling of 262406681 in words is "two hundred sixty-two million, four hundred six thousand, six hundred eighty-one".