2421504161 has 4 divisors (see below), whose sum is σ = 2421829524. Its totient is φ = 2421178800.

The previous prime is 2421504143. The next prime is 2421504179. The reversal of 2421504161 is 1614051242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1614051242 = 2 ⋅807025621.

It is an interprime number because it is at equal distance from previous prime (2421504143) and next prime (2421504179).

It can be written as a sum of positive squares in 2 ways, for example, as 1094286400 + 1327217761 = 33080^2 + 36431^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421504161 - 2³⁰ = 1347762337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2421504161.

It is not an unprimeable number, because it can be changed into a prime (2421504131) 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, 151250 + ... + 166491.

It is an arithmetic number, because the mean of its divisors is an integer number (605457381).

Almost surely, 2^2421504161 is an apocalyptic number.

It is an amenable number.

2421504161 is a deficient number, since it is larger than the sum of its proper divisors (325363).

2421504161 is an equidigital number, since it uses as much as digits as its factorization.

2421504161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325362.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 2421504161 is about 49208.7813403258. The cubic root of 2421504161 is about 1342.8527922551.

The spelling of 2421504161 in words is "two billion, four hundred twenty-one million, five hundred four thousand, one hundred sixty-one".