100145545 has 4 divisors (see below), whose sum is σ = 120174660. Its totient is φ = 80116432.

The previous prime is 100145533. The next prime is 100145621. The reversal of 100145545 is 545541001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24176889 + 75968656 = 4917^2 + 8716^2 .

It is a cyclic number.

It is not a de Polignac number, because 100145545 - 2⁷ = 100145417 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10014550 + ... + 10014559.

It is an arithmetic number, because the mean of its divisors is an integer number (30043665).

Almost surely, 2^100145545 is an apocalyptic number.

It is an amenable number.

100145545 is a deficient number, since it is larger than the sum of its proper divisors (20029115).

100145545 is an equidigital number, since it uses as much as digits as its factorization.

100145545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20029114.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 100145545 is about 10007.2746040068. The cubic root of 100145545 is about 464.3839608825.

Adding to 100145545 its reverse (545541001), we get a palindrome (645686546).

The spelling of 100145545 in words is "one hundred million, one hundred forty-five thousand, five hundred forty-five".