1145511100 has 18 divisors (see below), whose sum is σ = 2485759304. Its totient is φ = 458204400.

The previous prime is 1145511097. The next prime is 1145511149. The reversal of 1145511100 is 11155411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5727456 + ... + 5727655.

Almost surely, 2^1145511100 is an apocalyptic number.

1145511100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145511100 is an abundant number, since it is smaller than the sum of its proper divisors (1340248204).

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

1145511100 is a wasteful number, since it uses less digits than its factorization.

1145511100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11455125 (or 11455118 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 19.

The square root of 1145511100 is about 33845.3999828633. The cubic root of 1145511100 is about 1046.3245948755.

Adding to 1145511100 its reverse (11155411), we get a palindrome (1156666511).

The spelling of 1145511100 in words is "one billion, one hundred forty-five million, five hundred eleven thousand, one hundred".