40225421 has 2 divisors, whose sum is σ = 40225422. Its totient is φ = 40225420.

The previous prime is 40225399. The next prime is 40225429. The reversal of 40225421 is 12452204.

It is a happy number.

40225421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21855625 + 18369796 = 4675^2 + 4286^2 .

It is a cyclic number.

It is not a de Polignac number, because 40225421 - 2²² = 36031117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40225393 and 40225402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40225429) 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, 20112710 + 20112711.

It is an arithmetic number, because the mean of its divisors is an integer number (20112711).

Almost surely, 2^40225421 is an apocalyptic number.

It is an amenable number.

40225421 is a deficient number, since it is larger than the sum of its proper divisors (1).

40225421 is an equidigital number, since it uses as much as digits as its factorization.

40225421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40225421 is about 6342.3513778409. The cubic root of 40225421 is about 342.6364270823.

Adding to 40225421 its reverse (12452204), we get a palindrome (52677625).

The spelling of 40225421 in words is "forty million, two hundred twenty-five thousand, four hundred twenty-one".