1145554420 has 12 divisors (see below), whose sum is σ = 2405664324. Its totient is φ = 458221760.

The previous prime is 1145554411. The next prime is 1145554427. The reversal of 1145554420 is 244555411.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 410710756 + 734843664 = 20266^2 + 27108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145554427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28638841 + ... + 28638880.

It is an arithmetic number, because the mean of its divisors is an integer number (200472027).

Almost surely, 2^1145554420 is an apocalyptic number.

1145554420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145554420 is an abundant number, since it is smaller than the sum of its proper divisors (1260109904).

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

1145554420 is a wasteful number, since it uses less digits than its factorization.

1145554420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57277730 (or 57277728 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The square root of 1145554420 is about 33846.0399456125. The cubic root of 1145554420 is about 1046.3377843912.

Subtracting from 1145554420 its reverse (244555411), we obtain a palindrome (900999009).

The spelling of 1145554420 in words is "one billion, one hundred forty-five million, five hundred fifty-four thousand, four hundred twenty".