40572121 has 2 divisors, whose sum is σ = 40572122. Its totient is φ = 40572120.

The previous prime is 40572113. The next prime is 40572157. The reversal of 40572121 is 12127504.

It is a happy number.

40572121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25857225 + 14714896 = 5085^2 + 3836^2 .

It is a cyclic number.

It is not a de Polignac number, because 40572121 - 2³ = 40572113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40572092 and 40572101.

It is not a weakly prime, because it can be changed into another prime (40572101) 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 as a sum of consecutive naturals, namely, 20286060 + 20286061.

It is an arithmetic number, because the mean of its divisors is an integer number (20286061).

Almost surely, 2^40572121 is an apocalyptic number.

It is an amenable number.

40572121 is a deficient number, since it is larger than the sum of its proper divisors (1).

40572121 is an equidigital number, since it uses as much as digits as its factorization.

40572121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 40572121 is about 6369.6248712149. The cubic root of 40572121 is about 343.6179986398.

Adding to 40572121 its reverse (12127504), we get a palindrome (52699625).

The spelling of 40572121 in words is "forty million, five hundred seventy-two thousand, one hundred twenty-one".