100705143 has 80 divisors (see below), whose sum is σ = 180698112. Its totient is φ = 49392000.

The previous prime is 100705123. The next prime is 100705147. The reversal of 100705143 is 341507001.

It is not a de Polignac number, because 100705143 - 2¹⁶ = 100639607 is a prime.

It is a hoax number, since the sum of its digits (21) 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 (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100705147) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2456203 + ... + 2456243.

Almost surely, 2^100705143 is an apocalyptic number.

100705143 is a deficient number, since it is larger than the sum of its proper divisors (79992969).

100705143 is an equidigital number, since it uses as much as digits as its factorization.

100705143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 100705143 is about 10035.1952148426. The cubic root of 100705143 is about 465.2473236276.

The spelling of 100705143 in words is "one hundred million, seven hundred five thousand, one hundred forty-three".