206250421 has 8 divisors (see below), whose sum is σ = 224407064. Its totient is φ = 188421120.

The previous prime is 206250397. The next prime is 206250433. The reversal of 206250421 is 124052602.

It can be written as a sum of positive squares in 4 ways, for example, as 12100 + 206238321 = 110^2 + 14361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206250421 - 2¹¹ = 206248373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206250392 and 206250401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206250481) 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 7 ways as a sum of consecutive naturals, for example, 80520 + ... + 83041.

It is an arithmetic number, because the mean of its divisors is an integer number (28050883).

Almost surely, 2^206250421 is an apocalyptic number.

It is an amenable number.

206250421 is a deficient number, since it is larger than the sum of its proper divisors (18156643).

206250421 is a wasteful number, since it uses less digits than its factorization.

206250421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163671.

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

The square root of 206250421 is about 14361.4212736762. The cubic root of 206250421 is about 590.8332772386.

The spelling of 206250421 in words is "two hundred six million, two hundred fifty thousand, four hundred twenty-one".