1101620605 has 4 divisors (see below), whose sum is σ = 1321944732. Its totient is φ = 881296480.

The previous prime is 1101620603. The next prime is 1101620609. The reversal of 1101620605 is 5060261011.

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 274598041 + 827022564 = 16571^2 + 28758^2 .

It is not a de Polignac number, because 1101620605 - 2¹ = 1101620603 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101620603) 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, 110162056 + ... + 110162065.

It is an arithmetic number, because the mean of its divisors is an integer number (330486183).

Almost surely, 2^1101620605 is an apocalyptic number.

It is an amenable number.

1101620605 is a deficient number, since it is larger than the sum of its proper divisors (220324127).

1101620605 is an equidigital number, since it uses as much as digits as its factorization.

1101620605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220324126.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1101620605 is about 33190.6704511976. The cubic root of 1101620605 is about 1032.7868116475.

Adding to 1101620605 its reverse (5060261011), we get a palindrome (6161881616).

The spelling of 1101620605 in words is "one billion, one hundred one million, six hundred twenty thousand, six hundred five".