102766021 has 2 divisors, whose sum is σ = 102766022. Its totient is φ = 102766020.

The previous prime is 102766009. The next prime is 102766031. The reversal of 102766021 is 120667201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60372900 + 42393121 = 7770^2 + 6511^2 .

It is a cyclic number.

It is not a de Polignac number, because 102766021 - 2⁵ = 102765989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102766031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51383010 + 51383011.

It is an arithmetic number, because the mean of its divisors is an integer number (51383011).

Almost surely, 2^102766021 is an apocalyptic number.

It is an amenable number.

102766021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102766021 is an equidigital number, since it uses as much as digits as its factorization.

102766021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 102766021 is about 10137.3576932059. The cubic root of 102766021 is about 468.3995981374.

The spelling of 102766021 in words is "one hundred two million, seven hundred sixty-six thousand, twenty-one".