425624161 has 2 divisors, whose sum is σ = 425624162. Its totient is φ = 425624160.

The previous prime is 425624159. The next prime is 425624179. The reversal of 425624161 is 161426524.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406788561 + 18835600 = 20169^2 + 4340^2 .

It is a cyclic number.

It is not a de Polignac number, because 425624161 - 2¹ = 425624159 is a prime.

Together with 425624159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (425024161) 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, 212812080 + 212812081.

It is an arithmetic number, because the mean of its divisors is an integer number (212812081).

Almost surely, 2^425624161 is an apocalyptic number.

It is an amenable number.

425624161 is a deficient number, since it is larger than the sum of its proper divisors (1).

425624161 is an equidigital number, since it uses as much as digits as its factorization.

425624161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 425624161 is about 20630.6607019746. The cubic root of 425624161 is about 752.2151759231.

The spelling of 425624161 in words is "four hundred twenty-five million, six hundred twenty-four thousand, one hundred sixty-one".