406225439 has 2 divisors, whose sum is σ = 406225440. Its totient is φ = 406225438.

The previous prime is 406225409. The next prime is 406225441. The reversal of 406225439 is 934522604.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406225439 is a prime.

Together with 406225441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 406225399 and 406225408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406225409) 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, 203112719 + 203112720.

It is an arithmetic number, because the mean of its divisors is an integer number (203112720).

Almost surely, 2^406225439 is an apocalyptic number.

406225439 is a deficient number, since it is larger than the sum of its proper divisors (1).

406225439 is an equidigital number, since it uses as much as digits as its factorization.

406225439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 406225439 is about 20155.0350781139. The cubic root of 406225439 is about 740.6090912901.

The spelling of 406225439 in words is "four hundred six million, two hundred twenty-five thousand, four hundred thirty-nine".