1155140242 has 8 divisors (see below), whose sum is σ = 1834634556. Its totient is φ = 543595392.

The previous prime is 1155140237. The next prime is 1155140243. The reversal of 1155140242 is 2420415511.

It can be written as a sum of positive squares in 2 ways, for example, as 1106294121 + 48846121 = 33261^2 + 6989^2 .

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 (1155140243) 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, 16987323 + ... + 16987390.

Almost surely, 2^1155140242 is an apocalyptic number.

1155140242 is a deficient number, since it is larger than the sum of its proper divisors (679494314).

1155140242 is a wasteful number, since it uses less digits than its factorization.

1155140242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33974732.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1155140242 is about 33987.3541482711. The cubic root of 1155140242 is about 1049.2482122730.

Adding to 1155140242 its reverse (2420415511), we get a palindrome (3575555753).

The spelling of 1155140242 in words is "one billion, one hundred fifty-five million, one hundred forty thousand, two hundred forty-two".