381000129 has 32 divisors (see below), whose sum is σ = 544610304. Its totient is φ = 236396160.

The previous prime is 381000119. The next prime is 381000131. The reversal of 381000129 is 921000183.

It is not a de Polignac number, because 381000129 - 2¹⁷ = 380869057 is a prime.

It is a super-2 number, since 2×381000129² = 290322196596033282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381000099 and 381000108.

It is not an unprimeable number, because it can be changed into a prime (381000119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406149 + ... + 407085.

It is an arithmetic number, because the mean of its divisors is an integer number (17019072).

Almost surely, 2^381000129 is an apocalyptic number.

It is an amenable number.

381000129 is a deficient number, since it is larger than the sum of its proper divisors (163610175).

381000129 is a wasteful number, since it uses less digits than its factorization.

381000129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 381000129 is about 19519.2246003780. The cubic root of 381000129 is about 724.9505342390.

The spelling of 381000129 in words is "three hundred eighty-one million, one hundred twenty-nine", and thus it is an aban number.