102145025 has 12 divisors (see below), whose sum is σ = 128265600. Its totient is φ = 80680080.

The previous prime is 102145009. The next prime is 102145079. The reversal of 102145025 is 520541201.

It is not a de Polignac number, because 102145025 - 2⁴ = 102145009 is a prime.

It is a super-2 number, since 2×102145025² = 20867212264501250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102144988 and 102145006.

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, 23885 + ... + 27834.

It is an arithmetic number, because the mean of its divisors is an integer number (10688800).

Almost surely, 2^102145025 is an apocalyptic number.

It is an amenable number.

102145025 is a deficient number, since it is larger than the sum of its proper divisors (26120575).

102145025 is an equidigital number, since it uses as much as digits as its factorization.

102145025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51808 (or 51803 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 102145025 is about 10106.6821954586. The cubic root of 102145025 is about 467.4542073404.

Adding to 102145025 its reverse (520541201), we get a palindrome (622686226).

The spelling of 102145025 in words is "one hundred two million, one hundred forty-five thousand, twenty-five".