4661521 has 4 divisors (see below), whose sum is σ = 4692544. Its totient is φ = 4630500.

The previous prime is 4661513. The next prime is 4661537. The reversal of 4661521 is 1251664.

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 4661521 - 2³ = 4661513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4661551) 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, 15285 + ... + 15586.

It is an arithmetic number, because the mean of its divisors is an integer number (1173136).

Almost surely, 2^4661521 is an apocalyptic number.

It is an amenable number.

4661521 is a deficient number, since it is larger than the sum of its proper divisors (31023).

4661521 is a wasteful number, since it uses less digits than its factorization.

4661521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31022.

The product of its digits is 1440, while the sum is 25.

The square root of 4661521 is about 2159.0555805722. The cubic root of 4661521 is about 167.0484877192.

The spelling of 4661521 in words is "four million, six hundred sixty-one thousand, five hundred twenty-one".