1172049605 has 4 divisors (see below), whose sum is σ = 1406459532. Its totient is φ = 937639680.

The previous prime is 1172049601. The next prime is 1172049607. The reversal of 1172049605 is 5069402711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5069402711 = 19 ⋅266810669.

It can be written as a sum of positive squares in 2 ways, for example, as 150160516 + 1021889089 = 12254^2 + 31967^2 .

It is not a de Polignac number, because 1172049605 - 2² = 1172049601 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172049601) 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, 117204956 + ... + 117204965.

It is an arithmetic number, because the mean of its divisors is an integer number (351614883).

Almost surely, 2^1172049605 is an apocalyptic number.

It is an amenable number.

1172049605 is a deficient number, since it is larger than the sum of its proper divisors (234409927).

1172049605 is an equidigital number, since it uses as much as digits as its factorization.

1172049605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234409926.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1172049605 is about 34235.2100183422. The cubic root of 1172049605 is about 1054.3431908261.

The spelling of 1172049605 in words is "one billion, one hundred seventy-two million, forty-nine thousand, six hundred five".