40046561 has 8 divisors (see below), whose sum is σ = 40920000. Its totient is φ = 39180240.

The previous prime is 40046557. The next prime is 40046579. The reversal of 40046561 is 16564004.

It is a happy number.

40046561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40046561 - 2² = 40046557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40046561.

It is not an unprimeable number, because it can be changed into a prime (40046521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10490 + ... + 13788.

It is an arithmetic number, because the mean of its divisors is an integer number (5115000).

Almost surely, 2^40046561 is an apocalyptic number.

It is an amenable number.

40046561 is a deficient number, since it is larger than the sum of its proper divisors (873439).

40046561 is a wasteful number, since it uses less digits than its factorization.

40046561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 40046561 is about 6328.2352200278. The cubic root of 40046561 is about 342.1278348645.

The spelling of 40046561 in words is "forty million, forty-six thousand, five hundred sixty-one".