1155231342 has 16 divisors (see below), whose sum is σ = 2567180880. Its totient is φ = 385077096.

The previous prime is 1155231323. The next prime is 1155231347. The reversal of 1155231342 is 2431325511.

1155231342 is a `hidden beast` number, since 1 + 1 + 5 + 523 + 134 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155231347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10696533 + ... + 10696640.

It is an arithmetic number, because the mean of its divisors is an integer number (160448805).

Almost surely, 2^1155231342 is an apocalyptic number.

1155231342 is an abundant number, since it is smaller than the sum of its proper divisors (1411949538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155231342 is a wasteful number, since it uses less digits than its factorization.

1155231342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21393184 (or 21393178 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1155231342 is about 33988.6943262021. The cubic root of 1155231342 is about 1049.2757944937.

Adding to 1155231342 its reverse (2431325511), we get a palindrome (3586556853).

The spelling of 1155231342 in words is "one billion, one hundred fifty-five million, two hundred thirty-one thousand, three hundred forty-two".