1155020052 has 48 divisors (see below), whose sum is σ = 2856252672. Its totient is φ = 362019840.

The previous prime is 1155020047. The next prime is 1155020077. The reversal of 1155020052 is 2500205511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300213 + ... + 304035.

It is an arithmetic number, because the mean of its divisors is an integer number (59505264).

Almost surely, 2^1155020052 is an apocalyptic number.

1155020052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1155020052 is an abundant number, since it is smaller than the sum of its proper divisors (1701232620).

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

1155020052 is a wasteful number, since it uses less digits than its factorization.

1155020052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5328 (or 5326 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1155020052 is about 33985.5859446325. The cubic root of 1155020052 is about 1049.2118202944.

Adding to 1155020052 its reverse (2500205511), we get a palindrome (3655225563).

The spelling of 1155020052 in words is "one billion, one hundred fifty-five million, twenty thousand, fifty-two".