2675745421 has 4 divisors (see below), whose sum is σ = 2685692700. Its totient is φ = 2665798144.

The previous prime is 2675745389. The next prime is 2675745437. The reversal of 2675745421 is 1245475762.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1245475762 = 2 ⋅622737881.

It can be written as a sum of positive squares in 2 ways, for example, as 649485225 + 2026260196 = 25485^2 + 45014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2675745421 - 2⁵ = 2675745389 is a prime.

It is a super-2 number, since 2×2675745421² = 14319227116004934482, 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 (2675745491) 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, 4973236 + ... + 4973773.

It is an arithmetic number, because the mean of its divisors is an integer number (671423175).

Almost surely, 2^2675745421 is an apocalyptic number.

It is an amenable number.

2675745421 is a deficient number, since it is larger than the sum of its proper divisors (9947279).

2675745421 is an equidigital number, since it uses as much as digits as its factorization.

2675745421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947278.

The product of its digits is 470400, while the sum is 43.

The square root of 2675745421 is about 51727.6079187894. The cubic root of 2675745421 is about 1388.2944803195.

The spelling of 2675745421 in words is "two billion, six hundred seventy-five million, seven hundred forty-five thousand, four hundred twenty-one".