425122421 has 2 divisors, whose sum is σ = 425122422. Its totient is φ = 425122420.

The previous prime is 425122403. The next prime is 425122429. The reversal of 425122421 is 124221524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395811025 + 29311396 = 19895^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 425122421 - 2¹⁴ = 425106037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425122429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212561210 + 212561211.

It is an arithmetic number, because the mean of its divisors is an integer number (212561211).

Almost surely, 2^425122421 is an apocalyptic number.

It is an amenable number.

425122421 is a deficient number, since it is larger than the sum of its proper divisors (1).

425122421 is an equidigital number, since it uses as much as digits as its factorization.

425122421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 23.

The square root of 425122421 is about 20618.4970596792. The cubic root of 425122421 is about 751.9194808962.

Adding to 425122421 its reverse (124221524), we get a palindrome (549343945).

The spelling of 425122421 in words is "four hundred twenty-five million, one hundred twenty-two thousand, four hundred twenty-one".