378257 has 8 divisors (see below), whose sum is σ = 417312. Its totient is φ = 340000.

The previous prime is 378253. The next prime is 378269. The reversal of 378257 is 752873.

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 378257 - 2² = 378253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1382 + ... + 1632.

It is an arithmetic number, because the mean of its divisors is an integer number (52164).

2³⁷⁸²⁵⁷ is an apocalyptic number.

It is an amenable number.

378257 is a deficient number, since it is larger than the sum of its proper divisors (39055).

378257 is a wasteful number, since it uses less digits than its factorization.

378257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399.

The product of its digits is 11760, while the sum is 32.

The square root of 378257 is about 615.0260157099. The cubic root of 378257 is about 72.3206506300.

Subtracting from 378257 its sum of digits (32), we obtain a square (378225 = 615²).

The spelling of 378257 in words is "three hundred seventy-eight thousand, two hundred fifty-seven".