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250385 = 550077

250385 has 4 divisors (see below), whose sum is σ = 300468. Its totient is φ = 200304.

The previous prime is 250361. The next prime is 250403. The reversal of 250385 is 583052.

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 153664 + 96721 = 392^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 250385 - 212 = 246289 is a prime.

It is an alternating number because its digits alternate between even and odd.

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 250385.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 250385.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25034 + ... + 25043.

It is an arithmetic number, because the mean of its divisors is an integer number (75117).

2250385 is an apocalyptic number.

It is an amenable number.

250385 is a deficient number, since it is larger than the sum of its proper divisors (50083).

250385 is an equidigital number, since it uses as much as digits as its factorization.

250385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50082.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 250385 is about 500.3848518890. The cubic root of 250385 is about 63.0283738824.

The spelling of 250385 in words is "two hundred fifty thousand, three hundred eighty-five".

Divisors: 1 5 50077 250385