165101025 has 24 divisors (see below), whose sum is σ = 289026144. Its totient is φ = 82873600.

The previous prime is 165101021. The next prime is 165101039. The reversal of 165101025 is 520101561.

It is not a de Polignac number, because 165101025 - 2² = 165101021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165100992 and 165101010.

It is not an unprimeable number, because it can be changed into a prime (165101021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63471 + ... + 66020.

It is an arithmetic number, because the mean of its divisors is an integer number (12042756).

Almost surely, 2^165101025 is an apocalyptic number.

165101025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165101025 is a deficient number, since it is larger than the sum of its proper divisors (123925119).

165101025 is a wasteful number, since it uses less digits than its factorization.

165101025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129521 (or 129516 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 165101025 is about 12849.1643697168. The cubic root of 165101025 is about 548.5925723207.

Adding to 165101025 its reverse (520101561), we get a palindrome (685202586).

The spelling of 165101025 in words is "one hundred sixty-five million, one hundred one thousand, twenty-five".