1145004020 has 12 divisors (see below), whose sum is σ = 2404508484. Its totient is φ = 458001600.

The previous prime is 1145004017. The next prime is 1145004041. The reversal of 1145004020 is 204005411.

It can be written as a sum of positive squares in 2 ways, for example, as 669153424 + 475850596 = 25868^2 + 21814^2 .

It is a super-2 number, since 2×1145004020² = 2622068411632320800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1145004020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28625081 + ... + 28625120.

It is an arithmetic number, because the mean of its divisors is an integer number (200375707).

Almost surely, 2^1145004020 is an apocalyptic number.

1145004020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1145004020 is an abundant number, since it is smaller than the sum of its proper divisors (1259504464).

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

1145004020 is a wasteful number, since it uses less digits than its factorization.

1145004020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57250210 (or 57250208 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1145004020 is about 33837.9080322646. The cubic root of 1145004020 is about 1046.1701809539.

Adding to 1145004020 its reverse (204005411), we get a palindrome (1349009431).

The spelling of 1145004020 in words is "one billion, one hundred forty-five million, four thousand, twenty".