40562561 has 16 divisors (see below), whose sum is σ = 47854800. Its totient is φ = 34019328.

The previous prime is 40562531. The next prime is 40562569. The reversal of 40562561 is 16526504.

It can be written as a sum of positive squares in 8 ways, for example, as 430336 + 40132225 = 656^2 + 6335^2 .

It is a cyclic number.

It is not a de Polignac number, because 40562561 - 2¹⁰ = 40561537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40562569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3245 + ... + 9573.

It is an arithmetic number, because the mean of its divisors is an integer number (2990925).

Almost surely, 2^40562561 is an apocalyptic number.

It is an amenable number.

40562561 is a deficient number, since it is larger than the sum of its proper divisors (7292239).

40562561 is a wasteful number, since it uses less digits than its factorization.

40562561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6388.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 40562561 is about 6368.8743903456. The cubic root of 40562561 is about 343.5910076417.

The spelling of 40562561 in words is "forty million, five hundred sixty-two thousand, five hundred sixty-one".