40442461 has 4 divisors (see below), whose sum is σ = 40485852. Its totient is φ = 40399072.

The previous prime is 40442447. The next prime is 40442471. The reversal of 40442461 is 16424404.

40442461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33120025 + 7322436 = 5755^2 + 2706^2 .

It is a cyclic number.

It is not a de Polignac number, because 40442461 - 2⁵ = 40442429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442411) 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 3 ways as a sum of consecutive naturals, for example, 20266 + ... + 22171.

It is an arithmetic number, because the mean of its divisors is an integer number (10121463).

Almost surely, 2^40442461 is an apocalyptic number.

It is an amenable number.

40442461 is a deficient number, since it is larger than the sum of its proper divisors (43391).

40442461 is an equidigital number, since it uses as much as digits as its factorization.

40442461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43390.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 40442461 is about 6359.4387330959. The cubic root of 40442461 is about 343.2515642978.

Adding to 40442461 its reverse (16424404), we get a palindrome (56866865).

The spelling of 40442461 in words is "forty million, four hundred forty-two thousand, four hundred sixty-one".