1155131442 has 20 divisors (see below), whose sum is σ = 2588350446. Its totient is φ = 385043760.

The previous prime is 1155131437. The next prime is 1155131491. The reversal of 1155131442 is 2441315511.

1155131442 is a `hidden beast` number, since 1 + 1 + 5 + 513 + 144 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1009904841 + 145226601 = 31779^2 + 12051^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3565059 + ... + 3565382.

Almost surely, 2^1155131442 is an apocalyptic number.

1155131442 is an abundant number, since it is smaller than the sum of its proper divisors (1433219004).

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

1155131442 is an equidigital number, since it uses as much as digits as its factorization.

1155131442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7130455 (or 7130446 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1155131442 is about 33987.2246881089. The cubic root of 1155131442 is about 1049.2455478324.

Adding to 1155131442 its reverse (2441315511), we get a palindrome (3596446953).

The spelling of 1155131442 in words is "one billion, one hundred fifty-five million, one hundred thirty-one thousand, four hundred forty-two".