1145021544 has 96 divisors (see below), whose sum is σ = 3218529600. Its totient is φ = 367476480.

The previous prime is 1145021543. The next prime is 1145021551. The reversal of 1145021544 is 4451205411.

1145021544 is a `hidden beast` number, since 1 + 1 + 4 + 502 + 154 + 4 = 666.

It is a super-2 number, since 2×1145021544² = 2622148672448287872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145021543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217212 + ... + 222420.

It is an arithmetic number, because the mean of its divisors is an integer number (33526350).

Almost surely, 2^1145021544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145021544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1609264800).

1145021544 is an abundant number, since it is smaller than the sum of its proper divisors (2073508056).

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

1145021544 is a wasteful number, since it uses less digits than its factorization.

1145021544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335 (or 5328 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1145021544 is about 33838.1669716313. The cubic root of 1145021544 is about 1046.1755180510.

Adding to 1145021544 its reverse (4451205411), we get a palindrome (5596226955).

The spelling of 1145021544 in words is "one billion, one hundred forty-five million, twenty-one thousand, five hundred forty-four".