421200625 has 10 divisors (see below), whose sum is σ = 526333082. Its totient is φ = 336960000.

The previous prime is 421200601. The next prime is 421200629. The reversal of 421200625 is 526002124.

It can be written as a sum of positive squares in 5 ways, for example, as 44568976 + 376631649 = 6676^2 + 19407^2 .

It is not a de Polignac number, because 421200625 - 2¹⁹ = 420676337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421200596 and 421200605.

It is not an unprimeable number, because it can be changed into a prime (421200629) 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 in 9 ways as a sum of consecutive naturals, for example, 336336 + ... + 337585.

Almost surely, 2^421200625 is an apocalyptic number.

It is an amenable number.

421200625 is a deficient number, since it is larger than the sum of its proper divisors (105132457).

421200625 is an frugal number, since it uses more digits than its factorization.

421200625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673941 (or 673926 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 421200625 is about 20523.1728784806. The cubic root of 421200625 is about 749.6001572426.

Adding to 421200625 its reverse (526002124), we get a palindrome (947202749).

The spelling of 421200625 in words is "four hundred twenty-one million, two hundred thousand, six hundred twenty-five".