421350025 has 6 divisors (see below), whose sum is σ = 522474062. Its totient is φ = 337080000.

The previous prime is 421350001. The next prime is 421350029. The reversal of 421350025 is 520053124.

It can be written as a sum of positive squares in 3 ways, for example, as 1468944 + 419881081 = 1212^2 + 20491^2 .

It is not a de Polignac number, because 421350025 - 2²⁵ = 387795593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421349978 and 421350005.

It is not an unprimeable number, because it can be changed into a prime (421350029) 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 5 ways as a sum of consecutive naturals, for example, 8426976 + ... + 8427025.

Almost surely, 2^421350025 is an apocalyptic number.

It is an amenable number.

421350025 is a deficient number, since it is larger than the sum of its proper divisors (101124037).

421350025 is a wasteful number, since it uses less digits than its factorization.

421350025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16854011 (or 16854006 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 421350025 is about 20526.8123438589. The cubic root of 421350025 is about 749.6887745732.

The spelling of 421350025 in words is "four hundred twenty-one million, three hundred fifty thousand, twenty-five".