100540145 has 4 divisors (see below), whose sum is σ = 120648180. Its totient is φ = 80432112.

The previous prime is 100540117. The next prime is 100540151. The reversal of 100540145 is 541045001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541045001 = 7 ⋅77292143.

It can be written as a sum of positive squares in 2 ways, for example, as 62742241 + 37797904 = 7921^2 + 6148^2 .

It is a cyclic number.

It is not a de Polignac number, because 100540145 - 2⁶ = 100540081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10054010 + ... + 10054019.

It is an arithmetic number, because the mean of its divisors is an integer number (30162045).

Almost surely, 2^100540145 is an apocalyptic number.

It is an amenable number.

100540145 is a deficient number, since it is larger than the sum of its proper divisors (20108035).

100540145 is an equidigital number, since it uses as much as digits as its factorization.

100540145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20108034.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 100540145 is about 10026.9708785854. The cubic root of 100540145 is about 464.9930935113.

Adding to 100540145 its reverse (541045001), we get a palindrome (641585146).

The spelling of 100540145 in words is "one hundred million, five hundred forty thousand, one hundred forty-five".