2604665121 has 4 divisors (see below), whose sum is σ = 3472886832. Its totient is φ = 1736443412.

The previous prime is 2604665093. The next prime is 2604665137. The reversal of 2604665121 is 1215664062.

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.

It is a cyclic number.

It is not a de Polignac number, because 2604665121 - 2²⁶ = 2537556257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2604665191) 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, 434110851 + ... + 434110856.

It is an arithmetic number, because the mean of its divisors is an integer number (868221708).

Almost surely, 2^2604665121 is an apocalyptic number.

It is an amenable number.

2604665121 is a deficient number, since it is larger than the sum of its proper divisors (868221711).

2604665121 is an equidigital number, since it uses as much as digits as its factorization.

2604665121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868221710.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 2604665121 is about 51035.9199094128. The cubic root of 2604665121 is about 1375.8907939700.

The spelling of 2604665121 in words is "two billion, six hundred four million, six hundred sixty-five thousand, one hundred twenty-one".