1145505400 has 48 divisors (see below), whose sum is σ = 2868175800. Its totient is φ = 422954880.

The previous prime is 1145505391. The next prime is 1145505401. The reversal of 1145505400 is 45055411.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145505401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217690 + ... + 222889.

Almost surely, 2^1145505400 is an apocalyptic number.

1145505400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145505400 is an abundant number, since it is smaller than the sum of its proper divisors (1722670400).

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

1145505400 is a wasteful number, since it uses less digits than its factorization.

1145505400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440608 (or 440599 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1145505400 is about 33845.3157763375. The cubic root of 1145505400 is about 1046.3228593881.

The spelling of 1145505400 in words is "one billion, one hundred forty-five million, five hundred five thousand, four hundred".