421603725 has 12 divisors (see below), whose sum is σ = 697051616. Its totient is φ = 224855280.

The previous prime is 421603703. The next prime is 421603727. The reversal of 421603725 is 527306124.

It is not a de Polignac number, because 421603725 - 2¹⁹ = 421079437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421603692 and 421603701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421603727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2810617 + ... + 2810766.

Almost surely, 2^421603725 is an apocalyptic number.

It is an amenable number.

421603725 is a deficient number, since it is larger than the sum of its proper divisors (275447891).

421603725 is a wasteful number, since it uses less digits than its factorization.

421603725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5621396 (or 5621391 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 421603725 is about 20532.9911362178. The cubic root of 421603725 is about 749.8392099757.

Adding to 421603725 its reverse (527306124), we get a palindrome (948909849).

The spelling of 421603725 in words is "four hundred twenty-one million, six hundred three thousand, seven hundred twenty-five".