32072581 has 2 divisors, whose sum is σ = 32072582. Its totient is φ = 32072580.

The previous prime is 32072567. The next prime is 32072609. The reversal of 32072581 is 18527023.

It is an a-pointer prime, because the next prime (32072609) can be obtained adding 32072581 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31741956 + 330625 = 5634^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 32072581 - 2⁵ = 32072549 is a prime.

It is a super-2 number, since 2×32072581² = 2057300904003122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32072531) 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 as a sum of consecutive naturals, namely, 16036290 + 16036291.

It is an arithmetic number, because the mean of its divisors is an integer number (16036291).

Almost surely, 2^32072581 is an apocalyptic number.

It is an amenable number.

32072581 is a deficient number, since it is larger than the sum of its proper divisors (1).

32072581 is an equidigital number, since it uses as much as digits as its factorization.

32072581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 32072581 is about 5663.2659305387. The cubic root of 32072581 is about 317.7200607201.

The spelling of 32072581 in words is "thirty-two million, seventy-two thousand, five hundred eighty-one".