40240061 has 4 divisors (see below), whose sum is σ = 40292892. Its totient is φ = 40187232.

The previous prime is 40240033. The next prime is 40240093. The reversal of 40240061 is 16004204.

40240061 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 13912900 + 26327161 = 3730^2 + 5131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40240061 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 (40240261) 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, 25256 + ... + 26801.

It is an arithmetic number, because the mean of its divisors is an integer number (10073223).

Almost surely, 2^40240061 is an apocalyptic number.

It is an amenable number.

40240061 is a deficient number, since it is larger than the sum of its proper divisors (52831).

40240061 is an equidigital number, since it uses as much as digits as its factorization.

40240061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52830.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40240061 is about 6343.5054189305. The cubic root of 40240061 is about 342.6779894306.

Adding to 40240061 its reverse (16004204), we get a palindrome (56244265).

The spelling of 40240061 in words is "forty million, two hundred forty thousand, sixty-one".