1105120405 has 4 divisors (see below), whose sum is σ = 1326144492. Its totient is φ = 884096320.

The previous prime is 1105120397. The next prime is 1105120409. The reversal of 1105120405 is 5040215011.

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 235991044 + 869129361 = 15362^2 + 29481^2 .

It is not a de Polignac number, because 1105120405 - 2³ = 1105120397 is a prime.

It is a super-2 number, since 2×1105120405² = 2442582219094728050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105120409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110512036 + ... + 110512045.

It is an arithmetic number, because the mean of its divisors is an integer number (331536123).

Almost surely, 2^1105120405 is an apocalyptic number.

It is an amenable number.

1105120405 is a deficient number, since it is larger than the sum of its proper divisors (221024087).

1105120405 is an equidigital number, since it uses as much as digits as its factorization.

1105120405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221024086.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1105120405 is about 33243.3512901452. The cubic root of 1105120405 is about 1033.8793614952.

Adding to 1105120405 its reverse (5040215011), we get a palindrome (6145335416).

The spelling of 1105120405 in words is "one billion, one hundred five million, one hundred twenty thousand, four hundred five".