250165 has 4 divisors (see below), whose sum is σ = 300204. Its totient is φ = 200128.

The previous prime is 250153. The next prime is 250169. The reversal of 250165 is 561052.

It is a happy number.

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 40401 + 209764 = 201^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 250165 - 2⁷ = 250037 is a prime.

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

It is a Duffinian number.

250165 is a modest number, since divided by 165 gives 25 as remainder.

250165 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25012 + ... + 25021.

It is an arithmetic number, because the mean of its divisors is an integer number (75051).

2²⁵⁰¹⁶⁵ is an apocalyptic number.

It is an amenable number.

250165 is a deficient number, since it is larger than the sum of its proper divisors (50039).

250165 is an equidigital number, since it uses as much as digits as its factorization.

250165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50038.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 250165 is about 500.1649727840. The cubic root of 250165 is about 63.0099085784.

The spelling of 250165 in words is "two hundred fifty thousand, one hundred sixty-five".