1155404250 has 768 divisors, whose sum is σ = 4579061760. Its totient is φ = 209952000.

The previous prime is 1155404219. The next prime is 1155404273. The reversal of 1155404250 is 524045511.

1155404250 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 404 + 250 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 60810741 + ... + 60810759.

It is an arithmetic number, because the mean of its divisors is an integer number (5962320).

Almost surely, 2^1155404250 is an apocalyptic number.

1155404250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155404250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2289530880).

1155404250 is an abundant number, since it is smaller than the sum of its proper divisors (3423657510).

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

1155404250 is a wasteful number, since it uses less digits than its factorization.

1155404250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 60 counting only the distinct ones).

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

The square root of 1155404250 is about 33991.2378415379. The cubic root of 1155404250 is about 1049.3281416215.

Adding to 1155404250 its reverse (524045511), we get a palindrome (1679449761).

The spelling of 1155404250 in words is "one billion, one hundred fifty-five million, four hundred four thousand, two hundred fifty".