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421185025 = 52103163567
BaseRepresentation
bin11001000110101…
…100011000000001
31002100112102020101
4121012230120001
51330310410100
6105443242401
713303004452
oct3106543001
91070472211
10421185025
111a68255a8
12b9079401
136934b211
143dd1b129
1526e9a86a
hex191ac601

421185025 has 12 divisors (see below), whose sum is σ = 527343232. Its totient is φ = 333674640.

The previous prime is 421184971. The next prime is 421185029. The reversal of 421185025 is 520581124.

It is not a de Polignac number, because 421185025 - 217 = 421053953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421184984 and 421185002.

It is not an unprimeable number, because it can be changed into a prime (421185029) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 79209 + ... + 84358.

Almost surely, 2421185025 is an apocalyptic number.

It is an amenable number.

421185025 is a deficient number, since it is larger than the sum of its proper divisors (106158207).

421185025 is a wasteful number, since it uses less digits than its factorization.

421185025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163680 (or 163675 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 421185025 is about 20522.7928167684. The cubic root of 421185025 is about 749.5909028192.

The spelling of 421185025 in words is "four hundred twenty-one million, one hundred eighty-five thousand, twenty-five".

Divisors: 1 5 25 103 515 2575 163567 817835 4089175 16847401 84237005 421185025