381251 has 4 divisors (see below), whose sum is σ = 410592. Its totient is φ = 351912.

The previous prime is 381239. The next prime is 381253. The reversal of 381251 is 152183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381251 - 2¹⁸ = 119107 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381251.

It is not an unprimeable number, because it can be changed into a prime (381253) 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, 14651 + ... + 14676.

It is an arithmetic number, because the mean of its divisors is an integer number (102648).

2³⁸¹²⁵¹ is an apocalyptic number.

381251 is a deficient number, since it is larger than the sum of its proper divisors (29341).

381251 is a wasteful number, since it uses less digits than its factorization.

381251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29340.

The product of its digits is 240, while the sum is 20.

The square root of 381251 is about 617.4552615372. The cubic root of 381251 is about 72.5109614817.

The spelling of 381251 in words is "three hundred eighty-one thousand, two hundred fifty-one".