381429 has 20 divisors (see below), whose sum is σ = 605484. Its totient is φ = 238464.

The previous prime is 381419. The next prime is 381439. The reversal of 381429 is 924183.

It is an interprime number because it is at equal distance from previous prime (381419) and next prime (381439).

It can be written as a sum of positive squares in 2 ways, for example, as 178929 + 202500 = 423^2 + 450^2 .

It is not a de Polignac number, because 381429 - 2⁴ = 381413 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 381429.

It is not an unprimeable number, because it can be changed into a prime (381419) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1239 + ... + 1515.

381429 is a Friedman number, since it can be written as 42381*9, using all its digits and the basic arithmetic operations.

2³⁸¹⁴²⁹ is an apocalyptic number.

It is an amenable number.

381429 is a deficient number, since it is larger than the sum of its proper divisors (224055).

381429 is a wasteful number, since it uses less digits than its factorization.

381429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 297 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 381429 is about 617.5993847147. The cubic root of 381429 is about 72.5222444624.

The spelling of 381429 in words is "three hundred eighty-one thousand, four hundred twenty-nine".