1155505250 has 64 divisors (see below), whose sum is σ = 2207761920. Its totient is φ = 452771200.

The previous prime is 1155505243. The next prime is 1155505289. The reversal of 1155505250 is 525055511.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4834631 + ... + 4834869.

It is an arithmetic number, because the mean of its divisors is an integer number (34496280).

Almost surely, 2^1155505250 is an apocalyptic number.

1155505250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155505250 is a deficient number, since it is larger than the sum of its proper divisors (1052256670).

1155505250 is a wasteful number, since it uses less digits than its factorization.

1155505250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 1155505250 is about 33992.7234860639. The cubic root of 1155505250 is about 1049.3587165060.

The spelling of 1155505250 in words is "one billion, one hundred fifty-five million, five hundred five thousand, two hundred fifty".