1155540242 has 8 divisors (see below), whose sum is σ = 1751179836. Its totient is φ = 571813632.

The previous prime is 1155540241. The next prime is 1155540251. The reversal of 1155540242 is 2420455511.

It can be written as a sum of positive squares in 2 ways, for example, as 1045940281 + 109599961 = 32341^2 + 10469^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1155540241) 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, 2978003 + ... + 2978390.

Almost surely, 2^1155540242 is an apocalyptic number.

1155540242 is a deficient number, since it is larger than the sum of its proper divisors (595639594).

1155540242 is an equidigital number, since it uses as much as digits as its factorization.

1155540242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5956492.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 1155540242 is about 33993.2381805559. The cubic root of 1155540242 is about 1049.3693089256.

Adding to 1155540242 its reverse (2420455511), we get a palindrome (3575995753).

The spelling of 1155540242 in words is "one billion, one hundred fifty-five million, five hundred forty thousand, two hundred forty-two".