102806525 has 6 divisors (see below), whose sum is σ = 127480122. Its totient is φ = 82245200.

The previous prime is 102806521. The next prime is 102806551. The reversal of 102806525 is 525608201.

It can be written as a sum of positive squares in 3 ways, for example, as 15888196 + 86918329 = 3986^2 + 9323^2 .

It is not a de Polignac number, because 102806525 - 2² = 102806521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102806521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2056106 + ... + 2056155.

It is an arithmetic number, because the mean of its divisors is an integer number (21246687).

Almost surely, 2^102806525 is an apocalyptic number.

It is an amenable number.

102806525 is a deficient number, since it is larger than the sum of its proper divisors (24673597).

102806525 is an equidigital number, since it uses as much as digits as its factorization.

102806525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112271 (or 4112266 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 102806525 is about 10139.3552556363. The cubic root of 102806525 is about 468.4611280904.

The spelling of 102806525 in words is "one hundred two million, eight hundred six thousand, five hundred twenty-five".