32002561 has 4 divisors (see below), whose sum is σ = 32052672. Its totient is φ = 31952452.

The previous prime is 32002549. The next prime is 32002589. The reversal of 32002561 is 16520023.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16520023 = 13 ⋅1270771.

It is a cyclic number.

It is not a de Polignac number, because 32002561 - 2⁷ = 32002433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32002511) 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, 24085 + ... + 25378.

It is an arithmetic number, because the mean of its divisors is an integer number (8013168).

Almost surely, 2^32002561 is an apocalyptic number.

It is an amenable number.

32002561 is a deficient number, since it is larger than the sum of its proper divisors (50111).

32002561 is an equidigital number, since it uses as much as digits as its factorization.

32002561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50110.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 32002561 is about 5657.0806075219. The cubic root of 32002561 is about 317.4886796137.

Adding to 32002561 its reverse (16520023), we get a palindrome (48522584).

The spelling of 32002561 in words is "thirty-two million, two thousand, five hundred sixty-one".