32506021 has 2 divisors, whose sum is σ = 32506022. Its totient is φ = 32506020.

The previous prime is 32506003. The next prime is 32506039. The reversal of 32506021 is 12060523.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (32506003) and next prime (32506039).

It can be written as a sum of positive squares in only one way, i.e., 28037025 + 4468996 = 5295^2 + 2114^2 .

It is a cyclic number.

It is not a de Polignac number, because 32506021 - 2¹¹ = 32503973 is a prime.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 32506021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32506421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16253010 + 16253011.

It is an arithmetic number, because the mean of its divisors is an integer number (16253011).

Almost surely, 2^32506021 is an apocalyptic number.

It is an amenable number.

32506021 is a deficient number, since it is larger than the sum of its proper divisors (1).

32506021 is an equidigital number, since it uses as much as digits as its factorization.

32506021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 32506021 is about 5701.4051776733. The cubic root of 32506021 is about 319.1449209356.

Adding to 32506021 its reverse (12060523), we get a palindrome (44566544).

The spelling of 32506021 in words is "thirty-two million, five hundred six thousand, twenty-one".