102210725 has 12 divisors (see below), whose sum is σ = 126916356. Its totient is φ = 81655680.

The previous prime is 102210697. The next prime is 102210733. The reversal of 102210725 is 527012201.

It can be written as a sum of positive squares in 6 ways, for example, as 4418404 + 97792321 = 2102^2 + 9889^2 .

It is not a de Polignac number, because 102210725 - 2⁸ = 102210469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102210697 and 102210706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18929 + ... + 23721.

It is an arithmetic number, because the mean of its divisors is an integer number (10576363).

Almost surely, 2^102210725 is an apocalyptic number.

It is an amenable number.

102210725 is a deficient number, since it is larger than the sum of its proper divisors (24705631).

102210725 is an equidigital number, since it uses as much as digits as its factorization.

102210725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656 (or 5651 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 102210725 is about 10109.9319977931. The cubic root of 102210725 is about 467.5544085303.

Adding to 102210725 its reverse (527012201), we get a palindrome (629222926).

The spelling of 102210725 in words is "one hundred two million, two hundred ten thousand, seven hundred twenty-five".