100643045 has 8 divisors (see below), whose sum is σ = 122574624. Its totient is φ = 79312464.

The previous prime is 100642951. The next prime is 100643047. The reversal of 100643045 is 540346001.

It is a happy number.

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 100643045 - 2²⁶ = 33534181 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100643045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100643047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149879 + ... + 150548.

It is an arithmetic number, because the mean of its divisors is an integer number (15321828).

Almost surely, 2^100643045 is an apocalyptic number.

It is an amenable number.

100643045 is a deficient number, since it is larger than the sum of its proper divisors (21931579).

100643045 is an equidigital number, since it uses as much as digits as its factorization.

100643045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300499.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 100643045 is about 10032.1007271658. The cubic root of 100643045 is about 465.1516751902.

Adding to 100643045 its reverse (540346001), we get a palindrome (640989046).

The spelling of 100643045 in words is "one hundred million, six hundred forty-three thousand, forty-five".