4132561 has 4 divisors (see below), whose sum is σ = 4139632. Its totient is φ = 4125492.

The previous prime is 4132559. The next prime is 4132577. The reversal of 4132561 is 1652314.

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 4132561 - 2¹ = 4132559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4132511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2571 + ... + 3856.

It is an arithmetic number, because the mean of its divisors is an integer number (1034908).

Almost surely, 2^4132561 is an apocalyptic number.

4132561 is the 1286-th heptagonal number.

It is an amenable number.

4132561 is a deficient number, since it is larger than the sum of its proper divisors (7071).

4132561 is an equidigital number, since it uses as much as digits as its factorization.

4132561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070.

The product of its digits is 720, while the sum is 22.

The square root of 4132561 is about 2032.8701384988. The cubic root of 4132561 is about 160.4746452445.

Adding to 4132561 its reverse (1652314), we get a palindrome (5784875).

The spelling of 4132561 in words is "four million, one hundred thirty-two thousand, five hundred sixty-one".