100415405 has 4 divisors (see below), whose sum is σ = 120498492. Its totient is φ = 80332320.

The previous prime is 100415353. The next prime is 100415411. The reversal of 100415405 is 504514001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504514001 = 71 ⋅7105831.

It can be written as a sum of positive squares in 2 ways, for example, as 39980329 + 60435076 = 6323^2 + 7774^2 .

It is not a de Polignac number, because 100415405 - 2¹⁰ = 100414381 is a prime.

It is a super-2 number, since 2×100415405² = 20166507122628050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 10041536 + ... + 10041545.

It is an arithmetic number, because the mean of its divisors is an integer number (30124623).

Almost surely, 2^100415405 is an apocalyptic number.

It is an amenable number.

100415405 is a deficient number, since it is larger than the sum of its proper divisors (20083087).

100415405 is an equidigital number, since it uses as much as digits as its factorization.

100415405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20083086.

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

The square root of 100415405 is about 10020.7487245215. The cubic root of 100415405 is about 464.8007085252.

Adding to 100415405 its reverse (504514001), we get a palindrome (604929406).

The spelling of 100415405 in words is "one hundred million, four hundred fifteen thousand, four hundred five".