40650121 has 2 divisors, whose sum is σ = 40650122. Its totient is φ = 40650120.

The previous prime is 40650107. The next prime is 40650151. The reversal of 40650121 is 12105604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38576521 + 2073600 = 6211^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 40650121 - 2⁵ = 40650089 is a prime.

It is not a weakly prime, because it can be changed into another prime (40650151) 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 as a sum of consecutive naturals, namely, 20325060 + 20325061.

It is an arithmetic number, because the mean of its divisors is an integer number (20325061).

Almost surely, 2^40650121 is an apocalyptic number.

It is an amenable number.

40650121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40650121 is an equidigital number, since it uses as much as digits as its factorization.

40650121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 40650121 is about 6375.7447408126. The cubic root of 40650121 is about 343.8380598196.

Adding to 40650121 its reverse (12105604), we get a palindrome (52755725).

The spelling of 40650121 in words is "forty million, six hundred fifty thousand, one hundred twenty-one".