421415425 has 24 divisors (see below), whose sum is σ = 539387352. Its totient is φ = 326400000.

The previous prime is 421415413. The next prime is 421415471. The reversal of 421415425 is 524514124.

It can be written as a sum of positive squares in 12 ways, for example, as 197374401 + 224041024 = 14049^2 + 14968^2 .

It is not a de Polignac number, because 421415425 - 2⁷ = 421415297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421415393 and 421415402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138925 + ... + 141925.

It is an arithmetic number, because the mean of its divisors is an integer number (22474473).

Almost surely, 2^421415425 is an apocalyptic number.

It is an amenable number.

421415425 is a deficient number, since it is larger than the sum of its proper divisors (117971927).

421415425 is a wasteful number, since it uses less digits than its factorization.

421415425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189 (or 3184 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 421415425 is about 20528.4053204334. The cubic root of 421415425 is about 749.7275603067.

Adding to 421415425 its reverse (524514124), we get a palindrome (945929549).

The spelling of 421415425 in words is "four hundred twenty-one million, four hundred fifteen thousand, four hundred twenty-five".