10202681 has 2 divisors, whose sum is σ = 10202682. Its totient is φ = 10202680.

The previous prime is 10202663. The next prime is 10202701. The reversal of 10202681 is 18620201.

It is an a-pointer prime, because the next prime (10202701) can be obtained adding 10202681 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7513081 + 2689600 = 2741^2 + 1640^2 .

It is an emirp because it is prime and its reverse (18620201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10202681 - 2¹⁸ = 9940537 is a prime.

It is a super-2 number, since 2×10202681² = 208189399175522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10202611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101340 + 5101341.

It is an arithmetic number, because the mean of its divisors is an integer number (5101341).

Almost surely, 2^10202681 is an apocalyptic number.

It is an amenable number.

10202681 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202681 is an equidigital number, since it uses as much as digits as its factorization.

10202681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 10202681 is about 3194.1635837884. The cubic root of 10202681 is about 216.8892878162.

Adding to 10202681 its reverse (18620201), we get a palindrome (28822882).

The spelling of 10202681 in words is "ten million, two hundred two thousand, six hundred eighty-one".