102775081 has 4 divisors (see below), whose sum is σ = 108820692. Its totient is φ = 96729472.

The previous prime is 102775073. The next prime is 102775091. The reversal of 102775081 is 180577201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65869456 + 36905625 = 8116^2 + 6075^2 .

It is a cyclic number.

It is not a de Polignac number, because 102775081 - 2³ = 102775073 is a prime.

It is a super-2 number, since 2×102775081² = 21125434549113122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102775051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3022780 + ... + 3022813.

It is an arithmetic number, because the mean of its divisors is an integer number (27205173).

Almost surely, 2^102775081 is an apocalyptic number.

It is an amenable number.

102775081 is a deficient number, since it is larger than the sum of its proper divisors (6045611).

102775081 is an equidigital number, since it uses as much as digits as its factorization.

102775081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6045610.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 102775081 is about 10137.8045453639. The cubic root of 102775081 is about 468.4133626600.

The spelling of 102775081 in words is "one hundred two million, seven hundred seventy-five thousand, eighty-one".