1155521450 has 96 divisors (see below), whose sum is σ = 2369098368. Its totient is φ = 417536000.

The previous prime is 1155521429. The next prime is 1155521459. The reversal of 1155521450 is 541255511.

It is not an unprimeable number, because it can be changed into a prime (1155521459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2474117 + ... + 2474583.

It is an arithmetic number, because the mean of its divisors is an integer number (24678108).

Almost surely, 2^1155521450 is an apocalyptic number.

1155521450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155521450 is an abundant number, since it is smaller than the sum of its proper divisors (1213576918).

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

1155521450 is a wasteful number, since it uses less digits than its factorization.

1155521450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 29.

The square root of 1155521450 is about 33992.9617715197. The cubic root of 1155521450 is about 1049.3636204305.

Adding to 1155521450 its reverse (541255511), we get a palindrome (1696776961).

The spelling of 1155521450 in words is "one billion, one hundred fifty-five million, five hundred twenty-one thousand, four hundred fifty".