1155142244 has 6 divisors (see below), whose sum is σ = 2021498934. Its totient is φ = 577571120.

The previous prime is 1155142237. The next prime is 1155142253. The reversal of 1155142244 is 4422415511.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 999192100 + 155950144 = 31610^2 + 12488^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144392777 + ... + 144392784.

It is an arithmetic number, because the mean of its divisors is an integer number (336916489).

Almost surely, 2^1155142244 is an apocalyptic number.

It is an amenable number.

1155142244 is a deficient number, since it is larger than the sum of its proper divisors (866356690).

1155142244 is a wasteful number, since it uses less digits than its factorization.

1155142244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288785565 (or 288785563 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 1155142244 is about 33987.3836003891. The cubic root of 1155142244 is about 1049.2488184313.

Adding to 1155142244 its reverse (4422415511), we get a palindrome (5577557755).

The spelling of 1155142244 in words is "one billion, one hundred fifty-five million, one hundred forty-two thousand, two hundred forty-four".