102026681 has 2 divisors, whose sum is σ = 102026682. Its totient is φ = 102026680.

The previous prime is 102026677. The next prime is 102026693. The reversal of 102026681 is 186620201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58003456 + 44023225 = 7616^2 + 6635^2 .

It is a cyclic number.

It is not a de Polignac number, because 102026681 - 2² = 102026677 is a prime.

It is a super-2 number, since 2×102026681² = 20818887271751522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102026681.

It is not a weakly prime, because it can be changed into another prime (102026641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51013340 + 51013341.

It is an arithmetic number, because the mean of its divisors is an integer number (51013341).

Almost surely, 2^102026681 is an apocalyptic number.

It is an amenable number.

102026681 is a deficient number, since it is larger than the sum of its proper divisors (1).

102026681 is an equidigital number, since it uses as much as digits as its factorization.

102026681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 102026681 is about 10100.8257583229. The cubic root of 102026681 is about 467.2736086312.

Adding to 102026681 its reverse (186620201), we get a palindrome (288646882).

The spelling of 102026681 in words is "one hundred two million, twenty-six thousand, six hundred eighty-one".