40521345 has 8 divisors (see below), whose sum is σ = 64834176. Its totient is φ = 21611376.

The previous prime is 40521337. The next prime is 40521361. The reversal of 40521345 is 54312504.

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

It is not a de Polignac number, because 40521345 - 2³ = 40521337 is a prime.

It is an unprimeable number.

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, 1350697 + ... + 1350726.

It is an arithmetic number, because the mean of its divisors is an integer number (8104272).

Almost surely, 2^40521345 is an apocalyptic number.

It is an amenable number.

40521345 is a deficient number, since it is larger than the sum of its proper divisors (24312831).

40521345 is a wasteful number, since it uses less digits than its factorization.

40521345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701431.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 40521345 is about 6365.6378313567. The cubic root of 40521345 is about 343.4745928505.

Adding to 40521345 its reverse (54312504), we get a palindrome (94833849).

The spelling of 40521345 in words is "forty million, five hundred twenty-one thousand, three hundred forty-five".