387257 has 4 divisors (see below), whose sum is σ = 417060. Its totient is φ = 357456.

The previous prime is 387253. The next prime is 387263. The reversal of 387257 is 752783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752783 = 631 ⋅1193.

It can be written as a sum of positive squares in 2 ways, for example, as 32041 + 355216 = 179^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 387257 - 2² = 387253 is a prime.

It is a Duffinian number.

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 387257.

It is not an unprimeable number, because it can be changed into a prime (387253) 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, 14882 + ... + 14907.

It is an arithmetic number, because the mean of its divisors is an integer number (104265).

2³⁸⁷²⁵⁷ is an apocalyptic number.

It is an amenable number.

387257 is a deficient number, since it is larger than the sum of its proper divisors (29803).

387257 is a wasteful number, since it uses less digits than its factorization.

387257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29802.

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

The square root of 387257 is about 622.2997669934. The cubic root of 387257 is about 72.8897441107.

The spelling of 387257 in words is "three hundred eighty-seven thousand, two hundred fifty-seven".