100726405 has 16 divisors (see below), whose sum is σ = 132943104. Its totient is φ = 72797760.

The previous prime is 100726403. The next prime is 100726421. The reversal of 100726405 is 504627001.

It is not a de Polignac number, because 100726405 - 2¹ = 100726403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100726405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100726403) 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, 13431 + ... + 19540.

It is an arithmetic number, because the mean of its divisors is an integer number (8308944).

Almost surely, 2^100726405 is an apocalyptic number.

It is an amenable number.

100726405 is a deficient number, since it is larger than the sum of its proper divisors (32216699).

100726405 is a wasteful number, since it uses less digits than its factorization.

100726405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33036.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 100726405 is about 10036.2545304511. The cubic root of 100726405 is about 465.2800640690.

The spelling of 100726405 in words is "one hundred million, seven hundred twenty-six thousand, four hundred five".