210005125 has 32 divisors (see below), whose sum is σ = 287973504. Its totient is φ = 151632000.

The previous prime is 210005101. The next prime is 210005141. The reversal of 210005125 is 521500012.

It is not a de Polignac number, because 210005125 - 2¹¹ = 210003077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210005099 and 210005108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223657 + ... + 224593.

It is an arithmetic number, because the mean of its divisors is an integer number (8999172).

Almost surely, 2^210005125 is an apocalyptic number.

210005125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

210005125 is a deficient number, since it is larger than the sum of its proper divisors (77968379).

210005125 is a wasteful number, since it uses less digits than its factorization.

210005125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126 (or 1116 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 210005125 is about 14491.5535744102. The cubic root of 210005125 is about 594.3970305703.

Adding to 210005125 its reverse (521500012), we get a palindrome (731505137).

The spelling of 210005125 in words is "two hundred ten million, five thousand, one hundred twenty-five".