101000405 has 16 divisors (see below), whose sum is σ = 132663744. Its totient is φ = 73207680.

The previous prime is 101000401. The next prime is 101000407. The reversal of 101000405 is 504000101.

It is not a de Polignac number, because 101000405 - 2² = 101000401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101000401) 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, 14282 + ... + 20148.

It is an arithmetic number, because the mean of its divisors is an integer number (8291484).

Almost surely, 2^101000405 is an apocalyptic number.

It is an amenable number.

101000405 is a deficient number, since it is larger than the sum of its proper divisors (31663339).

101000405 is a wasteful number, since it uses less digits than its factorization.

101000405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6196.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 101000405 is about 10049.8957706038. The cubic root of 101000405 is about 465.7015732511.

Adding to 101000405 its reverse (504000101), we get a palindrome (605000506).

The spelling of 101000405 in words is "one hundred one million, four hundred five", and thus it is an aban number.