162407561 has 4 divisors (see below), whose sum is σ = 162648132. Its totient is φ = 162166992.

The previous prime is 162407527. The next prime is 162407587. The reversal of 162407561 is 165704261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165704261 = 1733 ⋅95617.

It can be written as a sum of positive squares in 2 ways, for example, as 154878025 + 7529536 = 12445^2 + 2744^2 .

It is a cyclic number.

It is not a de Polignac number, because 162407561 - 2¹⁰ = 162406537 is a prime.

It is a super-3 number, since 3×162407561³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162407501) 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, 119270 + ... + 120623.

It is an arithmetic number, because the mean of its divisors is an integer number (40662033).

Almost surely, 2^162407561 is an apocalyptic number.

It is an amenable number.

162407561 is a deficient number, since it is larger than the sum of its proper divisors (240571).

162407561 is an equidigital number, since it uses as much as digits as its factorization.

162407561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240570.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 162407561 is about 12743.9225123194. The cubic root of 162407561 is about 545.5929477840.

The spelling of 162407561 in words is "one hundred sixty-two million, four hundred seven thousand, five hundred sixty-one".