165304025 has 6 divisors (see below), whose sum is σ = 204977022. Its totient is φ = 132243200.

The previous prime is 165304019. The next prime is 165304033. The reversal of 165304025 is 520403561.

It can be written as a sum of positive squares in 3 ways, for example, as 9653449 + 155650576 = 3107^2 + 12476^2 .

It is not a de Polignac number, because 165304025 - 2¹² = 165299929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165303985 and 165304003.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3306056 + ... + 3306105.

It is an arithmetic number, because the mean of its divisors is an integer number (34162837).

Almost surely, 2^165304025 is an apocalyptic number.

It is an amenable number.

165304025 is a deficient number, since it is larger than the sum of its proper divisors (39672997).

165304025 is an equidigital number, since it uses as much as digits as its factorization.

165304025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6612171 (or 6612166 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 165304025 is about 12857.0612894238. The cubic root of 165304025 is about 548.8173209368.

Adding to 165304025 its reverse (520403561), we get a palindrome (685707586).

The spelling of 165304025 in words is "one hundred sixty-five million, three hundred four thousand, twenty-five".