1155101061 has 4 divisors (see below), whose sum is σ = 1540134752. Its totient is φ = 770067372.

The previous prime is 1155101053. The next prime is 1155101069. The reversal of 1155101061 is 1601015511.

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 an interprime number because it is at equal distance from previous prime (1155101053) and next prime (1155101069).

It is not a de Polignac number, because 1155101061 - 2³ = 1155101053 is a prime.

It is a super-2 number, since 2×1155101061² = 2668516922246651442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155101069) 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, 192516841 + ... + 192516846.

It is an arithmetic number, because the mean of its divisors is an integer number (385033688).

Almost surely, 2^1155101061 is an apocalyptic number.

It is an amenable number.

1155101061 is a deficient number, since it is larger than the sum of its proper divisors (385033691).

1155101061 is an equidigital number, since it uses as much as digits as its factorization.

1155101061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385033690.

The product of its (nonzero) digits is 150, while the sum is 21.

The square root of 1155101061 is about 33986.7777378203. Note that the first 4 decimals coincide. The cubic root of 1155101061 is about 1049.2363490499.

Adding to 1155101061 its reverse (1601015511), we get a palindrome (2756116572).

The spelling of 1155101061 in words is "one billion, one hundred fifty-five million, one hundred one thousand, sixty-one".