1156530241 has 4 divisors (see below), whose sum is σ = 1157182852. Its totient is φ = 1155877632.

The previous prime is 1156530239. The next prime is 1156530251. The reversal of 1156530241 is 1420356511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 676000000 + 480530241 = 26000^2 + 21921^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156530241 - 2¹ = 1156530239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156530251) 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, 323640 + ... + 327193.

It is an arithmetic number, because the mean of its divisors is an integer number (289295713).

Almost surely, 2^1156530241 is an apocalyptic number.

It is an amenable number.

1156530241 is a deficient number, since it is larger than the sum of its proper divisors (652611).

1156530241 is an equidigital number, since it uses as much as digits as its factorization.

1156530241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652610.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1156530241 is about 34007.7967678002. The cubic root of 1156530241 is about 1049.6689027109.

Adding to 1156530241 its reverse (1420356511), we get a palindrome (2576886752).

It can be divided in two parts, 115 and 6530241, that added together give a palindrome (6530356).

The spelling of 1156530241 in words is "one billion, one hundred fifty-six million, five hundred thirty thousand, two hundred forty-one".