381051 has 16 divisors (see below), whose sum is σ = 616320. Its totient is φ = 230760.

The previous prime is 381047. The next prime is 381061. The reversal of 381051 is 150183.

It is a happy number.

It is not a de Polignac number, because 381051 - 2² = 381047 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (381001) 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 15 ways as a sum of consecutive naturals, for example, 345 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (38520).

2³⁸¹⁰⁵¹ is an apocalyptic number.

381051 is a deficient number, since it is larger than the sum of its proper divisors (235269).

381051 is a wasteful number, since it uses less digits than its factorization.

381051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 381051 is about 617.2932852381. The cubic root of 381051 is about 72.4982797848.

It can be divided in two parts, 38 and 1051, that added together give a square (1089 = 33²).

The spelling of 381051 in words is "three hundred eighty-one thousand, fifty-one".