165298541 has 4 divisors (see below), whose sum is σ = 170630784. Its totient is φ = 159966300.

The previous prime is 165298513. The next prime is 165298561. The reversal of 165298541 is 145892561.

165298541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145892561 = 1321 ⋅110441.

It is a cyclic number.

It is not a de Polignac number, because 165298541 - 2¹⁸ = 165036397 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165298561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2666075 + ... + 2666136.

It is an arithmetic number, because the mean of its divisors is an integer number (42657696).

Almost surely, 2^165298541 is an apocalyptic number.

It is an amenable number.

165298541 is a deficient number, since it is larger than the sum of its proper divisors (5332243).

165298541 is an equidigital number, since it uses as much as digits as its factorization.

165298541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332242.

The product of its digits is 86400, while the sum is 41.

The square root of 165298541 is about 12856.8480196353. The cubic root of 165298541 is about 548.8112518217.

The spelling of 165298541 in words is "one hundred sixty-five million, two hundred ninety-eight thousand, five hundred forty-one".