4905461521 has 3 divisors (see below), whose sum is σ = 4905531561. Its totient is φ = 4905391482.

The previous prime is 4905461423. The next prime is 4905461557. The reversal of 4905461521 is 1251645094.

The square root of 4905461521 is 70039.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4905461521 - 2²⁷ = 4771243793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4905461921) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 35020 + ... + 105058.

It is an arithmetic number, because the mean of its divisors is an integer number (1635177187).

Almost surely, 2^4905461521 is an apocalyptic number.

4905461521 is the 70039-th square number.

4905461521 is the 35020-th centered octagonal number.

It is an amenable number.

4905461521 is a deficient number, since it is larger than the sum of its proper divisors (70040).

4905461521 is an frugal number, since it uses more digits than its factorization.

4905461521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140078 (or 70039 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The cubic root of 4905461521 is about 1699.1300648263.

The spelling of 4905461521 in words is "four billion, nine hundred five million, four hundred sixty-one thousand, five hundred twenty-one".