1155120019 has 8 divisors (see below), whose sum is σ = 1185639840. Its totient is φ = 1124712000.

The previous prime is 1155120017. The next prime is 1155120023. The reversal of 1155120019 is 9100215511.

It is a happy number.

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

It is not a de Polignac number, because 1155120019 - 2¹ = 1155120017 is a prime.

It is a super-2 number, since 2×1155120019² = 2668604516589120722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1155119975 and 1155120002.

It is not an unprimeable number, because it can be changed into a prime (1155120017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6807 + ... + 48544.

It is an arithmetic number, because the mean of its divisors is an integer number (148204980).

Almost surely, 2^1155120019 is an apocalyptic number.

1155120019 is a deficient number, since it is larger than the sum of its proper divisors (30519821).

1155120019 is an equidigital number, since it uses as much as digits as its factorization.

1155120019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55901.

The product of its (nonzero) digits is 450, while the sum is 25.

The square root of 1155120019 is about 33987.0566392561. The cubic root of 1155120019 is about 1049.2420891866.

The spelling of 1155120019 in words is "one billion, one hundred fifty-five million, one hundred twenty thousand, nineteen".