250609 has 4 divisors (see below), whose sum is σ = 254116. Its totient is φ = 247104.

The previous prime is 250583. The next prime is 250619. The reversal of 250609 is 906052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112225 + 138384 = 335^2 + 372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 250609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250619) 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 3 ways as a sum of consecutive naturals, for example, 1644 + ... + 1789.

It is an arithmetic number, because the mean of its divisors is an integer number (63529).

2²⁵⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

250609 is a deficient number, since it is larger than the sum of its proper divisors (3507).

250609 is an equidigital number, since it uses as much as digits as its factorization.

250609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 250609 is about 500.6086295700. The cubic root of 250609 is about 63.0471638094.

The spelling of 250609 in words is "two hundred fifty thousand, six hundred nine".