380257 has 4 divisors (see below), whose sum is σ = 385540. Its totient is φ = 374976.

The previous prime is 380251. The next prime is 380267. The reversal of 380257 is 752083.

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 314721 + 65536 = 561^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 380257 - 2⁷ = 380129 is a prime.

It is an Ulam number.

It is a Duffinian number.

380257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (380251) 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, 2532 + ... + 2677.

It is an arithmetic number, because the mean of its divisors is an integer number (96385).

2³⁸⁰²⁵⁷ is an apocalyptic number.

It is an amenable number.

380257 is a deficient number, since it is larger than the sum of its proper divisors (5283).

380257 is an equidigital number, since it uses as much as digits as its factorization.

380257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5282.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 380257 is about 616.6498195897. The cubic root of 380257 is about 72.4478896249.

The spelling of 380257 in words is "three hundred eighty thousand, two hundred fifty-seven".