1145211452 has 48 divisors (see below), whose sum is σ = 2505027840. Its totient is φ = 445046400.

The previous prime is 1145211433. The next prime is 1145211481. The reversal of 1145211452 is 2541125411.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121427 + ... + 130517.

It is an arithmetic number, because the mean of its divisors is an integer number (52188080).

Almost surely, 2^1145211452 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 1145211452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252513920).

1145211452 is an abundant number, since it is smaller than the sum of its proper divisors (1359816388).

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

1145211452 is a wasteful number, since it uses less digits than its factorization.

1145211452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9522 (or 9520 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

The square root of 1145211452 is about 33840.9729765561. The cubic root of 1145211452 is about 1046.2333528048.

Adding to 1145211452 its reverse (2541125411), we get a palindrome (3686336863).

The spelling of 1145211452 in words is "one billion, one hundred forty-five million, two hundred eleven thousand, four hundred fifty-two".