1155242005 has 8 divisors (see below), whose sum is σ = 1387901952. Its totient is φ = 923119248.

The previous prime is 1155241993. The next prime is 1155242017. The reversal of 1155242005 is 5002425511.

It is an interprime number because it is at equal distance from previous prime (1155241993) and next prime (1155242017).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1155242005 - 2¹⁹ = 1154717717 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 129549 + ... + 138178.

It is an arithmetic number, because the mean of its divisors is an integer number (173487744).

Almost surely, 2^1155242005 is an apocalyptic number.

It is an amenable number.

1155242005 is a deficient number, since it is larger than the sum of its proper divisors (232659947).

1155242005 is an equidigital number, since it uses as much as digits as its factorization.

1155242005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268595.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1155242005 is about 33988.8511868230. The cubic root of 1155242005 is about 1049.2790228206.

Adding to 1155242005 its reverse (5002425511), we get a palindrome (6157667516).

The spelling of 1155242005 in words is "one billion, one hundred fifty-five million, two hundred forty-two thousand, five".