165261461 has 4 divisors (see below), whose sum is σ = 166117932. Its totient is φ = 164404992.

The previous prime is 165261457. The next prime is 165261469. The reversal of 165261461 is 164162561.

165261461 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 an emirpimes, since its reverse is a distinct semiprime: 164162561 = 461 ⋅356101.

It can be written as a sum of positive squares in 2 ways, for example, as 54612100 + 110649361 = 7390^2 + 10519^2 .

It is a cyclic number.

It is not a de Polignac number, because 165261461 - 2² = 165261457 is a prime.

It is a super-2 number, since 2×165261461² = 54622700983709042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165261469) 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, 427946 + ... + 428331.

It is an arithmetic number, because the mean of its divisors is an integer number (41529483).

Almost surely, 2^165261461 is an apocalyptic number.

It is an amenable number.

165261461 is a deficient number, since it is larger than the sum of its proper divisors (856471).

165261461 is an equidigital number, since it uses as much as digits as its factorization.

165261461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856470.

The product of its digits is 8640, while the sum is 32.

The square root of 165261461 is about 12855.4059056881. The cubic root of 165261461 is about 548.7702120502.

The spelling of 165261461 in words is "one hundred sixty-five million, two hundred sixty-one thousand, four hundred sixty-one".