1145112500 has 144 divisors (see below), whose sum is σ = 2992308480. Its totient is φ = 374880000.

The previous prime is 1145112481. The next prime is 1145112511. The reversal of 1145112500 is 52115411.

It is a super-2 number, since 2×1145112500² = 2622565275312500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2012216 + ... + 2012784.

It is an arithmetic number, because the mean of its divisors is an integer number (20779920).

Almost surely, 2^1145112500 is an apocalyptic number.

1145112500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145112500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1496154240).

1145112500 is an abundant number, since it is smaller than the sum of its proper divisors (1847195980).

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

1145112500 is an equidigital number, since it uses as much as digits as its factorization.

1145112500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1145112500 is about 33839.5109302720. The cubic root of 1145112500 is about 1046.2032186712.

Adding to 1145112500 its reverse (52115411), we get a palindrome (1197227911).

The spelling of 1145112500 in words is "one billion, one hundred forty-five million, one hundred twelve thousand, five hundred".