421238025 has 36 divisors (see below), whose sum is σ = 812526988. Its totient is φ = 207377280.

The previous prime is 421237991. The next prime is 421238047. The reversal of 421238025 is 520832124.

421238025 is a `hidden beast` number, since 421 + 238 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 77951241 + 343286784 = 8829^2 + 18528^2 .

It is not a de Polignac number, because 421238025 - 2⁸ = 421237769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421238025.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 69082 + ... + 74931.

Almost surely, 2^421238025 is an apocalyptic number.

421238025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421238025 is a deficient number, since it is larger than the sum of its proper divisors (391288963).

421238025 is a wasteful number, since it uses less digits than its factorization.

421238025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144042 (or 144034 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 421238025 is about 20524.0840234102. The cubic root of 421238025 is about 749.6223431990.

The spelling of 421238025 in words is "four hundred twenty-one million, two hundred thirty-eight thousand, twenty-five".