381457 has 4 divisors (see below), whose sum is σ = 382900. Its totient is φ = 380016.

The previous prime is 381443. The next prime is 381461. The reversal of 381457 is 754183.

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 341056 + 40401 = 584^2 + 201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381467) 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, 198 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (95725).

2³⁸¹⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

381457 is a deficient number, since it is larger than the sum of its proper divisors (1443).

381457 is a wasteful number, since it uses less digits than its factorization.

381457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442.

The product of its digits is 3360, while the sum is 28.

The square root of 381457 is about 617.6220527151. The cubic root of 381457 is about 72.5240189938.

It can be divided in two parts, 381 and 457, that added together give a palindrome (838).

The spelling of 381457 in words is "three hundred eighty-one thousand, four hundred fifty-seven".