40834561 has 8 divisors (see below), whose sum is σ = 43635240. Its totient is φ = 38078208.

The previous prime is 40834543. The next prime is 40834567. The reversal of 40834561 is 16543804.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6682225 + 34152336 = 2585^2 + 5844^2 .

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 40834561 - 2⁵ = 40834529 is a prime.

It is a super-2 number, since 2×40834561² = 3334922744125442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40834567) 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, 9166 + ... + 12871.

It is an arithmetic number, because the mean of its divisors is an integer number (5454405).

Almost surely, 2^40834561 is an apocalyptic number.

It is an amenable number.

40834561 is a deficient number, since it is larger than the sum of its proper divisors (2800679).

40834561 is a wasteful number, since it uses less digits than its factorization.

40834561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22163.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 40834561 is about 6390.1925636087. The cubic root of 40834561 is about 344.3573023822.

It can be divided in two parts, 408 and 34561, that added together give a square (34969 = 187²).

The spelling of 40834561 in words is "forty million, eight hundred thirty-four thousand, five hundred sixty-one".