1155344061 has 4 divisors (see below), whose sum is σ = 1540458752. Its totient is φ = 770229372.

The previous prime is 1155343951. The next prime is 1155344107. The reversal of 1155344061 is 1604435511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1155344061 - 2⁷ = 1155343933 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 (1155344161) 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 3 ways as a sum of consecutive naturals, for example, 192557341 + ... + 192557346.

It is an arithmetic number, because the mean of its divisors is an integer number (385114688).

Almost surely, 2^1155344061 is an apocalyptic number.

It is an amenable number.

1155344061 is a deficient number, since it is larger than the sum of its proper divisors (385114691).

1155344061 is an equidigital number, since it uses as much as digits as its factorization.

1155344061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385114690.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1155344061 is about 33990.3524694876. The cubic root of 1155344061 is about 1049.3099202621.

Adding to 1155344061 its reverse (1604435511), we get a palindrome (2759779572).

The spelling of 1155344061 in words is "one billion, one hundred fifty-five million, three hundred forty-four thousand, sixty-one".