1155522402 has 128 divisors (see below), whose sum is σ = 2827249920. Its totient is φ = 348364800.

The previous prime is 1155522383. The next prime is 1155522409. The reversal of 1155522402 is 2042255511.

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

It is not an unprimeable number, because it can be changed into a prime (1155522409) 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 63 ways as a sum of consecutive naturals, for example, 2881402 + ... + 2881802.

It is an arithmetic number, because the mean of its divisors is an integer number (22087890).

Almost surely, 2^1155522402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155522402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1413624960).

1155522402 is an abundant number, since it is smaller than the sum of its proper divisors (1671727518).

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

1155522402 is a wasteful number, since it uses less digits than its factorization.

1155522402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 1155522402 is about 33992.9757744155. The cubic root of 1155522402 is about 1049.3639086104.

Adding to 1155522402 its reverse (2042255511), we get a palindrome (3197777913).

The spelling of 1155522402 in words is "one billion, one hundred fifty-five million, five hundred twenty-two thousand, four hundred two".