1155020452 has 6 divisors (see below), whose sum is σ = 2021285798. Its totient is φ = 577510224.

The previous prime is 1155020411. The next prime is 1155020459. The reversal of 1155020452 is 2540205511.

It can be written as a sum of positive squares in only one way, i.e., 1055340196 + 99680256 = 32486^2 + 9984^2 .

It is not an unprimeable number, because it can be changed into a prime (1155020459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144377553 + ... + 144377560.

Almost surely, 2^1155020452 is an apocalyptic number.

It is an amenable number.

1155020452 is a deficient number, since it is larger than the sum of its proper divisors (866265346).

1155020452 is a wasteful number, since it uses less digits than its factorization.

1155020452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288755117 (or 288755115 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1155020452 is about 33985.5918294797. The cubic root of 1155020452 is about 1049.2119414134.

Adding to 1155020452 its reverse (2540205511), we get a palindrome (3695225963).

The spelling of 1155020452 in words is "one billion, one hundred fifty-five million, twenty thousand, four hundred fifty-two".