100001381 has 8 divisors (see below), whose sum is σ = 103369728. Its totient is φ = 96642000.

The previous prime is 100001357. The next prime is 100001399. The reversal of 100001381 is 183100001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100001381 - 2¹⁰ = 100000357 is a prime.

It is a super-2 number, since 2×100001381² = 20000552403814322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26471 + ... + 30011.

It is an arithmetic number, because the mean of its divisors is an integer number (12921216).

Almost surely, 2^100001381 is an apocalyptic number.

It is an amenable number.

100001381 is a deficient number, since it is larger than the sum of its proper divisors (3368347).

100001381 is an equidigital number, since it uses as much as digits as its factorization.

100001381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 100001381 is about 10000.0690497616. The cubic root of 100001381 is about 464.1610200295.

Adding to 100001381 its reverse (183100001), we get a palindrome (283101382).

The spelling of 100001381 in words is "one hundred million, one thousand, three hundred eighty-one".