145531144 has 16 divisors (see below), whose sum is σ = 297677520. Its totient is φ = 66150480.

The previous prime is 145531123. The next prime is 145531151. The reversal of 145531144 is 441135541.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826794 + ... + 826969.

It is an arithmetic number, because the mean of its divisors is an integer number (18604845).

Almost surely, 2^145531144 is an apocalyptic number.

It is an amenable number.

145531144 is an abundant number, since it is smaller than the sum of its proper divisors (152146376).

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

145531144 is a wasteful number, since it uses less digits than its factorization.

145531144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653780 (or 1653776 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 145531144 is about 12063.6289730744. The cubic root of 145531144 is about 525.9994795351. Note that the first 3 decimals are identical.

Adding to 145531144 its reverse (441135541), we get a palindrome (586666685).

The spelling of 145531144 in words is "one hundred forty-five million, five hundred thirty-one thousand, one hundred forty-four".