32540681 has 2 divisors, whose sum is σ = 32540682. Its totient is φ = 32540680.

The previous prime is 32540659. The next prime is 32540701. The reversal of 32540681 is 18604523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28987456 + 3553225 = 5384^2 + 1885^2 .

It is a cyclic number.

It is not a de Polignac number, because 32540681 - 2⁶ = 32540617 is a prime.

It is a super-2 number, since 2×32540681² = 2117791839887522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32540611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16270340 + 16270341.

It is an arithmetic number, because the mean of its divisors is an integer number (16270341).

Almost surely, 2^32540681 is an apocalyptic number.

It is an amenable number.

32540681 is a deficient number, since it is larger than the sum of its proper divisors (1).

32540681 is an equidigital number, since it uses as much as digits as its factorization.

32540681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 32540681 is about 5704.4439693979. The cubic root of 32540681 is about 319.2583115571.

The spelling of 32540681 in words is "thirty-two million, five hundred forty thousand, six hundred eighty-one".