40671521 has 8 divisors (see below), whose sum is σ = 46298304. Its totient is φ = 35366320.

The previous prime is 40671509. The next prime is 40671529. The reversal of 40671521 is 12517604.

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

It is not a de Polignac number, because 40671521 - 2¹⁸ = 40409377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40671529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80126 + ... + 80631.

It is an arithmetic number, because the mean of its divisors is an integer number (5787288).

Almost surely, 2^40671521 is an apocalyptic number.

It is an amenable number.

40671521 is a deficient number, since it is larger than the sum of its proper divisors (5626783).

40671521 is a wasteful number, since it uses less digits than its factorization.

40671521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160791.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 40671521 is about 6377.4227553142. The cubic root of 40671521 is about 343.8983863612.

The spelling of 40671521 in words is "forty million, six hundred seventy-one thousand, five hundred twenty-one".