1181552465 has 4 divisors (see below), whose sum is σ = 1417862964. Its totient is φ = 945241968.

The previous prime is 1181552461. The next prime is 1181552483. The reversal of 1181552465 is 5642551811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5642551811 = 13 ⋅434042447.

It can be written as a sum of positive squares in 2 ways, for example, as 247149841 + 934402624 = 15721^2 + 30568^2 .

It is a cyclic number.

It is not a de Polignac number, because 1181552465 - 2² = 1181552461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1181552461) 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, 118155242 + ... + 118155251.

It is an arithmetic number, because the mean of its divisors is an integer number (354465741).

Almost surely, 2^1181552465 is an apocalyptic number.

It is an amenable number.

1181552465 is a deficient number, since it is larger than the sum of its proper divisors (236310499).

1181552465 is an equidigital number, since it uses as much as digits as its factorization.

1181552465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236310498.

The product of its digits is 48000, while the sum is 38.

The square root of 1181552465 is about 34373.7176488084. The cubic root of 1181552465 is about 1057.1850269232.

The spelling of 1181552465 in words is "one billion, one hundred eighty-one million, five hundred fifty-two thousand, four hundred sixty-five".