40852561 has 4 divisors (see below), whose sum is σ = 42261300. Its totient is φ = 39443824.

The previous prime is 40852549. The next prime is 40852573. The reversal of 40852561 is 16525804.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40852549) and next prime (40852573).

It can be written as a sum of positive squares in 2 ways, for example, as 31360000 + 9492561 = 5600^2 + 3081^2 .

It is a cyclic number.

It is not a de Polignac number, because 40852561 - 2⁵ = 40852529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40852501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704326 + ... + 704383.

It is an arithmetic number, because the mean of its divisors is an integer number (10565325).

Almost surely, 2^40852561 is an apocalyptic number.

It is an amenable number.

40852561 is a deficient number, since it is larger than the sum of its proper divisors (1408739).

40852561 is a wasteful number, since it uses less digits than its factorization.

40852561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408738.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 40852561 is about 6391.6008166969. The cubic root of 40852561 is about 344.4078928686.

The spelling of 40852561 in words is "forty million, eight hundred fifty-two thousand, five hundred sixty-one".