387457 has 4 divisors (see below), whose sum is σ = 442816. Its totient is φ = 332100.

The previous prime is 387449. The next prime is 387463. The reversal of 387457 is 754783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 387457 - 2³ = 387449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (387437) 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, 27669 + ... + 27682.

It is an arithmetic number, because the mean of its divisors is an integer number (110704).

2³⁸⁷⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

387457 is a deficient number, since it is larger than the sum of its proper divisors (55359).

387457 is an equidigital number, since it uses as much as digits as its factorization.

387457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55358.

The product of its digits is 23520, while the sum is 34.

The square root of 387457 is about 622.4604405101. The cubic root of 387457 is about 72.9022899910.

The spelling of 387457 in words is "three hundred eighty-seven thousand, four hundred fifty-seven".