32681021 has 8 divisors (see below), whose sum is σ = 34655544. Its totient is φ = 30712320.

The previous prime is 32681009. The next prime is 32681023. The reversal of 32681021 is 12018623.

It can be written as a sum of positive squares in 4 ways, for example, as 6528025 + 26152996 = 2555^2 + 5114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32681021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32681023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16631 + ... + 18491.

It is an arithmetic number, because the mean of its divisors is an integer number (4331943).

Almost surely, 2^32681021 is an apocalyptic number.

It is an amenable number.

32681021 is a deficient number, since it is larger than the sum of its proper divisors (1974523).

32681021 is a wasteful number, since it uses less digits than its factorization.

32681021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 32681021 is about 5716.7316711562. The cubic root of 32681021 is about 319.7166143477.

Adding to 32681021 its reverse (12018623), we get a palindrome (44699644).

The spelling of 32681021 in words is "thirty-two million, six hundred eighty-one thousand, twenty-one".